I want to get the 'Target...' properties from my deployment configuration.

Deploy-RsProject.ps1

function Deploy-RsProject
{
    <#
        .SYNOPSIS
            This script deploys a Reporting Services project to a Power BI Report Server.

        .DESCRIPTION
            This function deploys a full SSRS project to a Power BI Report Server.

        .PARAMETER ProjectFile
            Specify the location of the SSRS project file whose deployment profiles should be fetched.

        .EXAMPLE
            Deploy-RsProject -ProjectFile 'C:\Users\Aaron\source\repos\Finance\Financial Reports\SSRS_FR\SSRS_FR.rptproj'

            Description
            -----------
            Deploys all project files using all applicable settings from the project file.
    #>
    [CmdletBinding(SupportsShouldProcess = $true, ConfirmImpact = 'Medium')]
    param (
        [Parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true)]
        [string]$RsProjectFile,

        [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true)]
        [string]$TargetServerURL,
        
        [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true)]
        [string]$TargetReportFolder,
        
        [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true)]
        [string]$TargetDatasourceFolder,
        
        [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true)]
        [string]$TargetDatasetFolder,
        
        [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true)]
        [string]$TargetReportPartFolder,
        
        [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true)]
        [string]$OverwriteDatasets,
        
        [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true)]
        [string]$OverwriteDataSources,
        
        [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true)]
        [string]$FullPath,
        
        [Parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true)]
        [string]$ReportPortal
        )

[string]$ProjectFolder=Split-Path -Path $RsProjectFile

"`$ProjectFolder = '$ProjectFolder'"
"This deployment is going to happen using the $ConfigurationToUse profile.
"
$RSConfig | FL

<# RsFolder Structure
    Make sure all the folders needed already exist with the following code. #>
Write-Host "
Beginning deployment.
Building folder structures...
"

$TargetReportFolder, $TargetDatasourceFolder, $TargetDatasetFolder | 
sort -Unique | 
foreach {
    MakeDeploymentFolders -RsFolder $_ -ReportPortal $ReportPortal
}

<# Deploy Data Sources #>
Write-Host "
Deploying Data Sources to $($TargetDatasourceFolder)...
"
foreach($RDS in dir -Path $ProjectFolder -Filter *.rds)
{
    try{ Write-Verbose "Checking for $TargetDatasourceFolder/$($_.BaseName)"
        Get-RsRestItem -ReportPortalUri $ReportPortal -RsItem "$TargetDatasourceFolder/$($RDS.BaseName)" | ft -AutoSize
    }
    catch{ Write-Verbose 'Did not find Data Source'
        Write-RsRestCatalogItem -Path "$ProjectFolder\$($RDS.Name)" -ReportPortalUri $ReportPortal -RsFolder $TargetDatasourceFolder
    }
}

<# Deploy Data Sets & set their Data Source References. #>
Write-Host "
Deploying DataSets to $TargetDatasetFolder...
"
dir -Path $ProjectFolder  -Filter *.rsd | 
foreach{
    [XML]$dsetref = Get-Content "$ProjectFolder\$($_.Name)"
    $DataSetQuery = $dsetref.SharedDataSet.DataSet.Query

    $DSetConfig = [pscustomobject]@{
        DataSourceReference = $dsetref.SharedDataSet.DataSet.Query.DataSourceReference
        CommandText         = $dsetref.SharedDataSet.DataSet.Query.CommandText
        CommandType         = $dsetref.SharedDataSet.DataSet.Query.CommandType
        DataSetParameters   = $dsetref.SharedDataSet.DataSet.Query.DataSetParameters
    }

    Write-RsRestCatalogItem -Path "$ProjectFolder\$($_.Name)" -ReportPortalUri $ReportPortal -RsFolder $TargetDatasetFolder -Overwrite
    Set-RsDataSourceReference -ReportServerUri $ReportServer -Path "$TargetDatasetFolder/$($_.BaseName)" -DataSourceName DataSetDataSource -DataSourcePath "$($TargetDatasourceFolder)/$($DSetConfig.DataSourceReference)"
}

<# Deploy the Reports #>
Write-Host "Deploying the report files to $TargetReportFolder...
"
dir -Path $ProjectFolder -Filter *.rdl | 
foreach{
    $ReportName=$_.BaseName
    Write-RsCatalogItem -Path "$ProjectFolder\$($_.Name)" -ReportServerUri $ReportServer -RsFolder $TargetReportFolder -Overwrite
    "$($_.BaseName)";
    Get-RsRestItemDataSource -ReportPortalUri $ReportPortal -RsItem "$TargetReportFolder/$ReportName" | 
    foreach{
        Set-RsDataSourceReference -ReportServerUri $ReportServer -Path "$TargetReportFolder/$ReportName" -DataSourceName $_.Name -DataSourcePath "$($TargetDatasourceFolder)/$($_.Name)"
    }
}

<# Now read in the DataSet References directly from the report files and set them on the server #>
if($TargetDatasetFolder -ne $TargetReportFolder){
$Reports = dir -Path $ProjectFolder -Filter *.rdl

foreach($Report in $Reports)
{
[XML]$ReportDSetRef = Get-Content $Report.FullName
foreach($SDS in $ReportDSetRef.Report.DataSets.DataSet){
    Set-RsDataSetReference -ReportServerUri $ReportServer -Path "$TargetReportFolder/$($Report.BaseName)" -DataSetName $SDS.Name -DataSetPath "$TargetDatasetFolder/$($SDS.SharedDataSet.SharedDataSetReference)"
    }
}
}


}#-End of function

Get-RsDeploymentConfig.ps1

function Get-RsDeploymentConfig {
    param (
        [Parameter(Mandatory = $true)]
        [string]$RsProjectFile,

        [Parameter(Mandatory = $false)]
        [string]$ConfigurationToUse
    )

if($ConfigurationToUse){
    [XML]$rptproj = Get-Content $RsProjectFile
    $Deployment = $rptproj.Project.PropertyGroup | where { $_.FullPath -eq $ConfigurationToUse }

        $RSConfig = [pscustomobject]@{
            FullPath               = $Deployment.FullPath
            OverwriteDatasets      = $Deployment.OverwriteDatasets
            OverwriteDataSources   = $Deployment.OverwriteDataSources
            TargetReportFolder     = (StripTrailingSlash $Deployment.TargetReportFolder)
            TargetDatasetFolder    = (StripTrailingSlash $Deployment.TargetDatasetFolder)
            TargetDatasourceFolder = (StripTrailingSlash $Deployment.TargetDatasourceFolder)
            TargetReportPartFolder = (StripTrailingSlash $Deployment.TargetReportPartFolder)
            TargetServerURL        = $Deployment.TargetServerURL
            RsProjectFile          = $RsProjectFile
        }

    return $RSConfig
    }
else{[XML]$rptproj = Get-Content $RsProjectFile
    $ConfigurationToUse = $rptproj.Project.PropertyGroup.FullPath | ogv -PassThru
    $Deployment = $rptproj.Project.PropertyGroup | where { $_.FullPath -eq $ConfigurationToUse }

        $RSConfig = [pscustomobject]@{
            FullPath               = $Deployment.FullPath
            OverwriteDatasets      = $Deployment.OverwriteDatasets
            OverwriteDataSources   = $Deployment.OverwriteDataSources
            TargetReportFolder     = (StripTrailingSlash $Deployment.TargetReportFolder)
            TargetDatasetFolder    = (StripTrailingSlash $Deployment.TargetDatasetFolder)
            TargetDatasourceFolder = (StripTrailingSlash $Deployment.TargetDatasourceFolder)
            TargetReportPartFolder = (StripTrailingSlash $Deployment.TargetReportPartFolder)
            TargetServerURL        = $Deployment.TargetServerURL
            RsProjectFile          = $RsProjectFile
        }

    return $RSConfig
    }
}

MakeDeploymentFolders.ps1

function MakeDeploymentFolders {
    param($RsFolder,$ReportPortal)
    $tree=$null
    $tree
    $Base='/'
    ($RsFolder.substring(1,$RsFolder.length-1)).split('/') | foreach{
            $Folder = $_
            $tree += "/"+$Folder
            try{
                Get-RsRestItem -ReportPortalUri $ReportPortal -RsItem $tree| ft -AutoSize
            }
            catch{
                Write-Warning "Folder $tree does not exist";
                New-RsRestFolder -ReportPortalUri $ReportPortal -RsFolder $Base -FolderName $Folder -Verbose
            }
            $Base=$tree
        }
}

ReadingIn_anSSRS_ProjectFile.ipynb

ReadingIn_anSSRS_ProjectFile.ps1

[XML]$rptproj = Get-Content "c:\SQL Server Performance Dashboard\SQL Server Performance Dashboard\SQL Server Performance Dashboard.rptproj"

$Deployment = $rptproj.Project.Configurations.Configuration | where {$_.Name -eq 'Debug'} | 
$Deployment.Options

$RSConfig = [pscustomobject]@{
    TargetServerVersion         = $Deployment.Options.TargetServerVersion
    TargetServerURL             = $Deployment.Options.TargetServerURL
    TargetFolder                = $Deployment.Options.TargetFolder
    TargetDataSourceFolder      = $Deployment.Options.TargetDataSourceFolder
    TargetDatasetFolder         = $Deployment.Options.TargetDatasetFolder
    TargetReportPartFolder      = $Deployment.Options.TargetReportPartFolder
}


$RSConfig | FT -AutoSize

SQL Server Performance Dashboard.rptproj

<?xml version="1.0" encoding="Windows-1252"?>
<Project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" ToolsVersion="2.0">
  <State>$base64$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</State>
  <DataSources />
  <DataSets />
  <Reports>
    <ProjectItem>
      <Name>database_overview.rdl</Name>
      <FullPath>database_overview.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>database_storage_report.rdl</Name>
      <FullPath>database_storage_report.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>historical_io.rdl</Name>
      <FullPath>historical_io.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>historical_waits.rdl</Name>
      <FullPath>historical_waits.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>missing_index_from_showplan.rdl</Name>
      <FullPath>missing_index_from_showplan.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>missing_indexes.rdl</Name>
      <FullPath>missing_indexes.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>page_details.rdl</Name>
      <FullPath>page_details.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>performance_dashboard_main.rdl</Name>
      <FullPath>performance_dashboard_main.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>plan_guide.rdl</Name>
      <FullPath>plan_guide.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>query_plan.rdl</Name>
      <FullPath>query_plan.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>query_stats.rdl</Name>
      <FullPath>query_stats.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>query_stats_details.rdl</Name>
      <FullPath>query_stats_details.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>recent_cpu.rdl</Name>
      <FullPath>recent_cpu.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>requests_overview.rdl</Name>
      <FullPath>requests_overview.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>session_details.rdl</Name>
      <FullPath>session_details.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>sessions_overview.rdl</Name>
      <FullPath>sessions_overview.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>traces.rdl</Name>
      <FullPath>traces.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>wait_blocking.rdl</Name>
      <FullPath>wait_blocking.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>wait_buffer_io.rdl</Name>
      <FullPath>wait_buffer_io.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>wait_buflatch.rdl</Name>
      <FullPath>wait_buflatch.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>wait_generic.rdl</Name>
      <FullPath>wait_generic.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>wait_latch.rdl</Name>
      <FullPath>wait_latch.rdl</FullPath>
    </ProjectItem>
  </Reports>
  <Configurations>
    <Configuration>
      <Name>Debug</Name>
      <Platform>Win32</Platform>
      <Options>
        <OutputPath>bin\Debug</OutputPath>
        <TargetServerVersion>SSRS2008R2</TargetServerVersion>
        <TargetServerURL>http://pariklaptop/reportserver</TargetServerURL>
        <TargetFolder>SQL Server Performance Dashboard</TargetFolder>
        <TargetDataSourceFolder>Data Sources</TargetDataSourceFolder>
        <TargetDatasetFolder>Datasets</TargetDatasetFolder>
        <TargetReportPartFolder>Report Parts</TargetReportPartFolder>
      </Options>
    </Configuration>
    <Configuration>
      <Name>DebugLocal</Name>
      <Platform>Win32</Platform>
      <Options>
        <OutputPath>bin\DebugLocal</OutputPath>
        <TargetServerVersion>SSRS2008R2</TargetServerVersion>
        <TargetFolder>SQL Server Performance Dashboard</TargetFolder>
        <TargetDataSourceFolder>Data Sources</TargetDataSourceFolder>
        <TargetDatasetFolder>Datasets</TargetDatasetFolder>
        <TargetReportPartFolder>Report Parts</TargetReportPartFolder>
      </Options>
    </Configuration>
    <Configuration>
      <Name>Release</Name>
      <Platform>Win32</Platform>
      <Options>
        <OutputPath>bin\Release</OutputPath>
        <TargetServerVersion>SSRS2008R2</TargetServerVersion>
        <TargetFolder>SQL Server Performance Dashboard</TargetFolder>
        <TargetDataSourceFolder>Data Sources</TargetDataSourceFolder>
        <TargetDatasetFolder>Datasets</TargetDatasetFolder>
        <TargetReportPartFolder>Report Parts</TargetReportPartFolder>
      </Options>
    </Configuration>
  </Configurations>
</Project>

StripTrailingSlash.ps1

function StripTrailingSlash {
    param($t)

    if($t.endswith("/")) {
        $t.substring(0,$t.length-1)
    } else {
        $t
    }
}

A Start

cls
$proj=@"
<?xml version="1.0" encoding="Windows-1252"?>
<Project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" ToolsVersion="2.0">
  <State>$base64$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</State>
  <DataSources />
  <DataSets />
  <Reports>
    <ProjectItem>
      <Name>database_overview.rdl</Name>
      <FullPath>database_overview.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>database_storage_report.rdl</Name>
      <FullPath>database_storage_report.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>historical_io.rdl</Name>
      <FullPath>historical_io.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>historical_waits.rdl</Name>
      <FullPath>historical_waits.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>missing_index_from_showplan.rdl</Name>
      <FullPath>missing_index_from_showplan.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>missing_indexes.rdl</Name>
      <FullPath>missing_indexes.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>page_details.rdl</Name>
      <FullPath>page_details.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>performance_dashboard_main.rdl</Name>
      <FullPath>performance_dashboard_main.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>plan_guide.rdl</Name>
      <FullPath>plan_guide.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>query_plan.rdl</Name>
      <FullPath>query_plan.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>query_stats.rdl</Name>
      <FullPath>query_stats.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>query_stats_details.rdl</Name>
      <FullPath>query_stats_details.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>recent_cpu.rdl</Name>
      <FullPath>recent_cpu.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>requests_overview.rdl</Name>
      <FullPath>requests_overview.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>session_details.rdl</Name>
      <FullPath>session_details.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>sessions_overview.rdl</Name>
      <FullPath>sessions_overview.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>traces.rdl</Name>
      <FullPath>traces.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>wait_blocking.rdl</Name>
      <FullPath>wait_blocking.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>wait_buffer_io.rdl</Name>
      <FullPath>wait_buffer_io.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>wait_buflatch.rdl</Name>
      <FullPath>wait_buflatch.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>wait_generic.rdl</Name>
      <FullPath>wait_generic.rdl</FullPath>
    </ProjectItem>
    <ProjectItem>
      <Name>wait_latch.rdl</Name>
      <FullPath>wait_latch.rdl</FullPath>
    </ProjectItem>
  </Reports>
  <Configurations>
    <Configuration>
      <Name>Debug</Name>
      <Platform>Win32</Platform>
      <Options>
        <OutputPath>bin\Debug</OutputPath>
        <TargetServerVersion>SSRS2008R2</TargetServerVersion>
        <TargetServerURL>http://pariklaptop/reportserver</TargetServerURL>
        <TargetFolder>SQL Server Performance Dashboard</TargetFolder>
        <TargetDataSourceFolder>Data Sources</TargetDataSourceFolder>
        <TargetDatasetFolder>Datasets</TargetDatasetFolder>
        <TargetReportPartFolder>Report Parts</TargetReportPartFolder>
      </Options>
    </Configuration>
    <Configuration>
      <Name>DebugLocal</Name>
      <Platform>Win32</Platform>
      <Options>
        <OutputPath>bin\DebugLocal</OutputPath>
        <TargetServerVersion>SSRS2008R2</TargetServerVersion>
        <TargetFolder>SQL Server Performance Dashboard</TargetFolder>
        <TargetDataSourceFolder>Data Sources</TargetDataSourceFolder>
        <TargetDatasetFolder>Datasets</TargetDatasetFolder>
        <TargetReportPartFolder>Report Parts</TargetReportPartFolder>
      </Options>
    </Configuration>
    <Configuration>
      <Name>Release</Name>
      <Platform>Win32</Platform>
      <Options>
        <OutputPath>bin\Release</OutputPath>
        <TargetServerVersion>SSRS2008R2</TargetServerVersion>
        <TargetFolder>SQL Server Performance Dashboard</TargetFolder>
        <TargetDataSourceFolder>Data Sources</TargetDataSourceFolder>
        <TargetDatasetFolder>Datasets</TargetDatasetFolder>
        <TargetReportPartFolder>Report Parts</TargetReportPartFolder>
      </Options>
    </Configuration>
  </Configurations>
</Project>
"@

$xml=[xml]$proj
$xml.project.Configurations.Configuration.options

Result

OutputPath             : bin\Debug
TargetServerVersion    : SSRS2008R2
TargetServerURL        : http://pariklaptop/reportserver
TargetFolder           : SQL Server Performance Dashboard
TargetDataSourceFolder : Data Sources
TargetDatasetFolder    : Datasets
TargetReportPartFolder : Report Parts

OutputPath             : bin\DebugLocal
TargetServerVersion    : SSRS2008R2
TargetFolder           : SQL Server Performance Dashboard
TargetDataSourceFolder : Data Sources
TargetDatasetFolder    : Datasets
TargetReportPartFolder : Report Parts

OutputPath             : bin\Release
TargetServerVersion    : SSRS2008R2
TargetFolder           : SQL Server Performance Dashboard
TargetDataSourceFolder : Data Sources
TargetDatasetFolder    : Datasets
TargetReportPartFolder : Report Parts

Oh Doug, I should have mentioned. I'm actually trying to make the experience more like this:
$rptproj.Project.Configurations.Configuration | OGV -PassThru | SELECT -ExpandProperty Options

Example call for Get-RsDeploymentConfig:
$RSConfig = Get-RsDeploymentConfig -RsProjectFile 'C:\Users\Aaron\source\repos\Finance\SSRS_Finance\SSRS_Finance.rptproj' -ConfigurationToUse Dev01 $RSConfig | Add-Member -PassThru -MemberType NoteProperty -Name ReportPortal -Value 'http://localhost/PBIRSportal/' $RSConfig | Deploy-RsProject
Second example:

$RSConfig = Get-RsDeploymentConfig -RsProjectFile 'C:\Users\Aaron\source\repos\Finance\SSRS_Finance\SSRS_Finance.rptproj'