Mail Big Sur Shortcut Quotation level

Hello, I was under Mojave and the shortcut in Apple Mail for the quotation level was ⌘-’ (if my memory is good).
Under Big Sur it’s ⌘-^ (Frenck Keyboard) and it doesn’t work.
I’m trying to customize it via the system prefs like I did for Excel but I can’t get it to work.
Does anyone have any tips? I’ve done some research and I can figure out how to customize a shortcut, but I’ve done that and it works (in Excel).
I’ve tried several shortcuts but none work in Apple Mail.
Thank you for your help.