Runspace testing. Probably best not to use it yet, though.

Runspace_Module_Import.ps1

<#
    .NOTES
    =======================================================
     Version:      v0.1.00
     Created:      04/11/2021
     Platform:     Linux/Windows 
     PSVersion:    7.2.4
    =======================================================
    .DESCRIPTION
        Imports modules in separate runspace and returns them to main session
#>

# ------------------------------------------------------------------------
$moduleArray = @( 'PSWriteHTML', 'PSEverything', 'AWSPowerShell.NetCore' )
# ------------------------------------------------------------------------

$StopWatch = New-Object System.Diagnostics.Stopwatch
$StopWatch2 = New-Object System.Diagnostics.Stopwatch

$obs = [System.Collections.ObjectModel.ObservableCollection[Object]]::new()
$Global:x = [Hashtable]::Synchronized(@{})
$x.Host = $Host
$x.ObsCollection = $obs
$x.Modules = $moduleArray
$x.Imported = $null

$rs = [runspacefactory]::CreateRunspace()
$rs.ApartmentState, $rs.ThreadOptions = 'STA', 'ReUseThread'
$rs.Open()
$rs.SessionStateProxy.SetVariable('x', $x)

function ImportMods {
    $Global:x.Imported | Foreach-Object { Import-Module $_ }
    $StopWatch2.Stop()
    write-host "Loading Modules To Host Session Complete: $($StopWatch2.ElapsedMilliseconds)ms" -BackgroundColor Black -ForegroundColor Green   
}

$script = {
    try { 
        $modules = $x.Modules
        $mods = $modules | Foreach-Object { $mod = Import-Module $_ -PassThru; $mod } 
        $x.Imported = $mods
        $x.ObsCollection.Add($_)  | Out-Null
    } catch { $x.Host.UI.WriteVerboseLine( $_) }
}

$psCmd = [PowerShell]::Create().AddScript($script) 
$psCmd.Runspace = $rs
write-host 'Loading Modules' -BackgroundColor Black -ForegroundColor Green

$StopWatch.Start()

$handle = $psCmd.BeginInvoke()

try {
    $null = Register-ObjectEvent -InputObject $obs -EventName CollectionChanged -Action {
        $StopWatch.Stop()
        write-host "Loading Modules Complete $($StopWatch.ElapsedMilliseconds)ms" -BackgroundColor Black -ForegroundColor Green    

        $result = $psCmd.EndInvoke($handle);
        
        $StopWatch2.Start()
        ImportMods
        $psCmd.Dispose(); $rs.Close(); $rs.Dispose(); Get-EventSubscriber | Unregister-Event
    }
} catch {
    write-host $_
}