As to which keyboard it is, its a smaller non extended version without the number pad. Not sure how that would play into it as its a new Mac. So its an Apple keypad.
As mentioned, Ive been away from Macs a very long time so nothing is obvious. Even settings. I've only spent a few minutes looking for that, but not having use of functions working was a real downer. Other keys were fine, so scaling, navigating and such were fine.
I would suggest he go with a larger keyboard as well. I'm used to the larger keypad on a PC, and not having that is a bit wonky. Geez, I'd have thought a Mac Studio would come with a larger keyboard with the numerical keypad.
I'll get over there today or tomorrow to resolve and check "settings".The other aspects of getting him up to speed with his Studiolive mixers all went well. Just those darn F keys.