Usually to read what files are in an .iso image file one has to Mount it in File Explorer which will show as a drive with a letter then use that drive letter.
If trying to install Win11 on unsupported equipment, I can say I did the single-file change mentioned on forums on 2 Notebooks from 2014 and they have received the Patch Tuesday updates, no issues seen yet. I did the Upgrade from within Win10 File Explorer. Also, it didn't work to replace that file in the .iso as it's Read-only so I used the USB Thumb drive made by the MCT process.