Extract Space content type page as template and save to SharePoint

[CmdletBinding()]
param (
    [Parameter(Mandatory = $true)]
    [string]$Url,
    $saveDir = (Resolve-path ".\"),
    [Parameter(Mandatory = $true)]
    [string]$pageTitle,
    [Parameter(Mandatory = $true)]
    [string]$templateName
)
begin{
 Write-Host  $saveDir
    Write-Host "Connecting to " $Url
    Connect-PnPOnline -Url $Url -Interactive
}
process {

    Write-Host "Getting page..."l

    $web = Get-PnPWeb
    $sourceSite = $web.ServerRelativeUrl
    $library = "Site Pages"

    #get all pages in the site pages library
    $pages = Get-PnPListItem -List $library
 
    #save current homepage
    $currentHomePage = Get-PnPHomePage
 
    $pagesList = New-Object System.Collections.Generic.List[System.Object]

    $pages | Foreach-Object{
        
        if($_.FileSystemObjectType -eq "File"){
		    $pagePath = $_.FieldValues["FileRef"]
            
            if($_.FieldValues["Title"]) {$pageTitleLibrary = $_.FieldValues["Title"].ToString()}

		    #set space page as home page and save the template		
		    if($pageTitleLibrary.ToLower() -eq $pageTitle.ToLower()){
			    Set-PnPHomePage -RootFolderRelativeUrl ($pagePath -replace ($sourceSite+"/"), "")	
			    Get-PnPSiteTemplate -out $($saveDir.Path + "\" + $templateName + ".xml") -Handlers PageContents					 
		    }		
	    }
    }

    #change back default homepage
    Set-PnPHomePage -RootFolderRelativeUrl $currentHomePage

    #wait for homepage to be set
    Start-Sleep -Seconds 5 
 
    #open and update xml
    $xmlFile = [xml][io.File]::ReadAllText($($saveDir.Path + "\" + $templateName + ".xml"))
    $xmlFile.Provisioning.Templates.ProvisioningTemplate.RemoveChild($mainFile.Provisioning.Templates.ProvisioningTemplate.WebSettings)	
    $xmlfile.Provisioning.Templates.ProvisioningTemplate.ClientSidePages.ClientSidePage.Title = $("##PAGENAME##").ToString()
    $xmlfile.Provisioning.Templates.ProvisioningTemplate.ClientSidePages.ClientSidePage.PageName = $("##PAGENAME##.aspx").ToString()
 
    #save final template
    $mainFile.Save($($saveDir.Path + "\" + $templateName + ".xml"))


    ((Get-Content -path $($saveDir.Path + "\" + $templateName + ".xml") -Raw) -replace '##PAGENAME##', $pageTitle) | Set-Content -Path 'temp.xml'
 
    #create new page using template
    Invoke-PnPSiteTemplate -path temp.xml
    Remove-Item -Path 'temp.xml'
    
    Write-Host "Space file added"  -ForegroundColor Cyan
}