MultiAppKioskModus Windows 11

I am trying to configure the kiosk mode in windows 11 with multiapps using a powershell script. I found an official guide on Microsoft's website but it doesn't work. The most I have achieved with my code is that I don't get an error when I run it but then when I log in with the kiosk user it automatically unlocks before the desktop appears.kiosk.ps1:$nameSpaceName="root\cimv2\mdm\dmmap"$className="MDM_AssignedAccess"$obj = Get-CimInstance -Namespace $namespaceName -ClassName $classNameAdd-Type -AssemblyName System.Web$obj.Configuration = [System.Web.HttpUtility]::HtmlEncode@"<?xml version=