The Division One College Basketball transfer portal officially opened March 13, and so far Braeden Moore is the lone BYU scholarship player that has hit the portal (walk-on Hao Dong also entered). Things could change, but I expect one or two more players to enter the portal before the window to enter closes May 13.
As of now, BYU has two scholarships to fill with the graduations of Gideon George and Rudi Williams and Braeden Moore transferring. 2021 signee Jake Wahlin is expected to return home from his LDS mission to Lithuania May 16. Sources tell me he has grown to 6-foot-9 on his mission.