On a German MacBook Pro (keyboard setting is German) several shortcuts don’t work.
For “zoom to fit” [Shift][1] is documented and works; for “zoom to selection” [Shift][2] is documented but instead toggles “pixel grid hidden/visible” (as [Shift]['] also does).
For “Show/hide UI” [Command][ \ ] is documented, while instead [Command][.] does the trick.
a) Pls ensure that the help area shows THE shortcuts which indeed do work.
b) Pls keep the shortcuts in-sync as far as possible also over different keyboard layouts. (E.g. in German any shortcut w/ [ \ ] will always be harder to reach as just for the backslash three keys have to be held (option shift 7) instead of two on the US keyboard.)
I changed the shortcut for taking a screenshot (instead of CommandShiftControl4 it’s CommandESC now).
And I added some app shortcuts, but none for Figma yet.
So I can’t see any settings which should hinder [Control][2] from working.
(And even if there would be something, then a non-working Shortcut shouldn’t be shown in the menu under “Figma > View”.)
Did you look at the article linked above? Have you changed the keyboard layout to the one you need in the Figma preferences as described in the same article?