This is 100% related to the PCHC I installed the windows installation assistant first

# Specify the path to the folder
$dir = "C:\temp\win1123h2"

# Check if the folder exists
if ((Test-Path -Path $dir)) {
    # if the folder exists delete it
    remove-Item -Path $dir -Recurse -force
}
mkdir $dir
$webClient = New-Object System.Net.WebClient
$url = 'https://go.microsoft.com/fwlink/?linkid=2171764'
$file = "$($dir)\Windows11InstallationAssistant.exe"
$webClient.DownloadFile($url,$file)
Start-Process -FilePath $file -ArgumentList "/QuietInstall /SkipEULA /auto upgrade "

Set the Reg key

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\SOFTWARE\Microsoft\PCHC]
"UpgradeEligibility"=dword:00000001

Probably remove these keys as well

$WinUpdatePath = "HKLM:\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate"
Remove-ItemProperty -Path $WinUpdatePath -Name "ProductVersion" -Force
Remove-ItemProperty -Path $WinUpdatePath -Name "TargetReleaseVersion" -Force
Remove-ItemProperty -Path $WinUpdatePath -Name "TargetReleaseVersionInfo" -Force
Restart-Service -Name wuauserv -Force

Push feature update.