Even though people do not yet know if Gojo is actually alive after being cut in half by Sukuna or if this is just a hallucination Sukuna sees after being cornered, they are very excited about the ...

Of course, in order for Yuta to take control of Gojo's body, Gojo himself had to die. This happened in the fight against Sukuna, where the World Splitting Dismantle chopped him in half.