First, if they want to go to the NBA, they're already getting too old, so they may not be looking to stay all 4 years anyway. Might as well play them, even if only 10 minutes while they work their bodies back.
Second, they get more NIL money if they play, I would guess.
Third, if they don't play, they may transfer.
So I think Collin will play. I like the idea of Khalifa redshirting if he's not 100% healed, which would also give us an extra year of an experienced center and let us work in a new guy.