Get-ProvisioningTemplate.ps1

function Get-ScriptFiles{
    #get all files
    $query ="<View Scope='RecursiveAll'><Query><Where><Eq><FieldRef Name='FSObjType' /><Value Type='Integer'>0</Value></Eq></Where></Query><ViewFields><FieldRef Name='FileLeafRef' /><FieldRef Name='FileDirRef' /></ViewFields></View>"
    $listItems = Get-PnPListItem -List $librarySiteAssets -Query $query
    $libraryFolderPath = $librarySiteAssets + $scriptFolder
    $folderPath = $PSScriptRoot + "\" + $folderFiles
    
    foreach($listItem in $listItems){
        #get all items in the folder 'Scripts'
        if($listItem.FieldValues.FileDirRef -match $scriptFolder){
            $scriptFile = $libraryFolderPath + "/" + $listItem.FieldValues.FileLeafRef
            #Save file to locale
            Get-PnPFile -Url $scriptFile -AsFile -Path $folder

            #Add file data to provsioning template
            $filePath = $folderPath + "\" + $listItem.FieldValues.FileLeafRef
            Add-PnPFileToProvisioningTemplate -Path $provisioningTemplateFilePath -Source $filePath -Folder $libraryFolderPath
        }
    }
}