Im using Version 14.0 (14A309)
In Xcode 13 i used the keybinding Control ⌃ + Option ⌥ + Command ⌘ + F to fix all errors in scope, for example an enum with missing cases.
It is not possible in Xcode 14 since the "Fix All Issues" button is disabled all the time.
You can navigate to "Fix All Issues" from: Editor -> "Fix All Issues" but its not possible to tap the button.