If I were coaching Wemby, I would tell him to stop with the “Fade away” jumpers. I also would tell him to stop trying post up moves.
I would tell him straight up “Bro, you are 7’5. Just turn around and shoot”
His post move should be this. Once he gets his feet in the paint and the ball is thrown to him, just turn around and shoot.
You can see his inexperience. He is shooting the ball off balanced. With his height, he will always have a high center of gravity making him easily off balance with physical play. He can resolve that by simple Turing around and shooting the ball. Bro you 7’5. You don’t need post moves.