Set-ProvisioningTemplate.ps1

function Set-WebPart($fileName, $webPart, $ZoneId, $ZoneIndex, $listName, $isRootWeb) {
    $web = Get-PnPWeb -Includes "ParentWeb"
    #Destination page where the web part will be added
    $serverRelativePageUrl = $web.ServerRelativeUrl + "/SitePages/" + $fileName
    #Location for all web part XML-files
    $directory = Get-Location
    #web part file path
    $file = $directory.Path + "\" + $webPart
    #create new web part file path for updating information
    $newFile = $file.Replace(".xml", "_new.xml")
    #copy the file as temp for adding it to SharePoint page
    Copy-Item -Path $file -Destination $newFile

    #Replace the old ULR to new URL
    if($isRootWeb) {
        #Replace URL for the rootsite
        $rootWeb = $web.ParentWeb
        (Get-Content $newFile) -replace '/dbag/dmses', $rootWeb.ServerRelativeUrl | Set-Content $newFile
    }
    else {
        #Replace the URL for the subiste
        (Get-Content $newFile) -replace '/dbag/dmses/provtempl', $web.ServerRelativeUrl | Set-Content $newFile
    }

    #Check if the web part uses list
    if($listName) {
        $list = Get-PnPList -Identity $listName
        $views = Get-PnPView -List $listName
        
        #Replace the known old list ID with the new of the destination subsite
        Write-Host("     Replace list id with " + $list.Id)
        (Get-Content $newFile) -replace '{#listNameId#}', $list.Id | Set-Content $newFile
        
        #Replace the known old view ID with the new view ID of the destination subiste
        Write-Host("     Replace view id with " + $views[0].Id)
        (Get-Content $newFile) -replace '{#viewNameId#}', $views[0].Id | Set-Content $newFile
    }
    
    #Add web part to SharePoint page
    if($webPart -ne "provisioningtemplate_webpart_Homepage.aspx_3.xml") {
        Add-PnPWebPartToWebPartPage -ServerRelativePageUrl $serverRelativePageUrl -Path $newFile -ZoneId $ZoneId -ZoneIndex $ZoneIndex
    } else {
        #Bug German Calender View Part for using Add-PnPWebPartToWebPartPage
        #Solution: Use default SharePoint CSOM     
        Add-WebPartToPage -ServerRelativePageUrl $serverRelativePageUrl -newFile $newFile -wpZoneID $ZoneId -wpZoneOrder $ZoneIndex
    }
    
    Remove-Item -Path $newFile
}