This was simply down to the fact that Yuta exuded way too much cursed energy, and now, Rika cannot be manifested fully. This also means that he cannot utilize the copied technique as he would like.

With each strike that Yuji lands on him, his cursed energy output decreases, and his control over Megumi's body weakens greatly as well. Yuta copied Sukunas cursed technique recently in JJK.

but that is limited by his levels of Cursed Energy. Therefore, if he had Yuta Okkotsu's degrees of energy, Choso could have been one of the most powerful characters in Jujutsu Kaisen and could ...