I broke two metacarpals (3rd and 4th), both fingers and a tiny wrist bone. Cast up to knuckles was 4-6 weeks, I forget exactly.
Hand was (and still is after 18 months) weaker – there isnt a great blood supply to that area.
Bones set slightly squint so I now struggle slightly with jars, screwdriver, etc, using ‘The Claw’. But it hasn’t noticably weaked for riding.
(They can’t really set the bones without an op to pin them but everything being equal one would not want to undergo an op because there isn’t much free room for a surgeon to digging around in there and there are nerves that need avoiding.)
Get one of those squeezy balls to build strength initially. I got a 661 wrist guard but didn’t need to bother with it after few rides