No user permissions on XGP Version files

I want to start messing around with mods, but I cannot access the games files. On the Game Pass version, Windows does not let you make any changes whatsoever to the game files. When I try to copy any of the .bnk files, a dialogue box pops up with the message “You’ll need to provide administrator permission to copy this file”. I already used Take Ownership on all of the files, and I added my user account as the WindowsApps folder’s owner. Does anyone know how to mod files on the windows store version of the game?