Since I installed Xcode 13, I have problems with the key bindings. I use a French keyboard (AZERTY) Exemple with "Comment selection". The default key shortcut is ⌘\ and I never changed it before. With Xcode 13, the shortcut is ⌘?. Even if I change the bindings.
On a French keyboard, I need to press shift to get "/" The shortcut remains the same.
I have the same issue, I cannot change the shortcut for comment. It says default is Command + / which I want but in the structure menu it shows Command + É on French keyboard.
See a possible workaround in https://developer.apple.com/forums/thread/693416