Obviously 78 guys is quite a few more than even get drafted. As we have seen, many second rounders never make rosters. I hope he does well at the combine. Its a great chance to get seen by scouts and to get feedback. From his tape alone, I think he is a maybe second rounder. He does have a skillset that narrowly has a place in the NBA, but a team maybe has one of him.
Unless the scouts tell him something different than my gut, I think he is better off coming back, taking some NIL money, being relevant in BB for one more year, and maybe having a breakout season that ups his stock. Absent injury, he won't be any worse off going into the draft next year.