Please use the comment content in the autounattend.xml document as a reference.
<?xml version="1.0" encoding="utf-8"?>
<unattend xmlns="urn:schemas-microsoft-com:unattend">
<settings pass="windowsPE">
</settings>
<settings pass="specialize">
<component...
1. Save the following content as winpeshl.ini
2. Open the boot.wim file with 7-Zip, navigate to Index 2, and drag the winpeshl.ini file into the \Windows\System32\ directory.
3. Update the modified boot.wim file in the sources folder of the original ISO file.