Background:
Up through 23H2, I have a tried and true process for 'imaging' PCs. I understand it is antiquated, but for our small shop, it works well.
Install media - USB created using the media creation toolkit
WSIM used to create autounattend.xml file.
AutoUnattend_Files directory in root of...
Hate to hijack, but it seems you may know the answer based on #2 above. If autounattend.xml goes to Windows\panther, where does the Autounattend_files folder go? My experimentation with 24H2 has went ok until I get the the list of firstlogon commands that use files that should have copied...