1) CK is a real quarterback for the defense. He's not just guarding his man, he's guarding the paint, and telling his teammates what's going on - he's moving a lot even when the ball is at the 3 point line.
2) Again, opposing players are thinking twice about challenging him in the paint.
3) I'm pretty sure that after 3 games he's leading the league in both rebounding and blocked shots. I'll check again tomorrow when the stats are updated:
https://www.nba.com/2024-summer-league-player-stats?dir=D&sort=REB