Maho made his bones crack and Sukuna used both arms to try and stop it but couldn't and when he got hit, he's surprised and says not bad.
He did use
cleave, after Maho slapped him. I guess Sukuna wasn't serious, but I don't see how that discredits Mahoraga's overall standing as the zenin's treasure and considered useful against Gojo and the reason the past TS and Limitless killed one another in battle. I just don't see Yuta randomly being fast as Maho.
I thought this was just a joke argument earlier, why would Yuta be aware of Mahoraga and know saying return works?