There was an excellent NBA scouting report that shows his shooting form (and free throw form) and where he needs to improve. It was hard to see during the season because of the typical camera angle during free throws (and because he took so few jump shots), but Kofi shoots over his left shoulder, a la Lonzo Ball. His release and follow through are ok, and that is what we mostly see when he shoots free throws, but he is actually holding the ball on the wrong side of his body, resulting in blocked vision and side spin. See: