What actually happened with Gojo's body after he died in JJK?

yeah this is real, not fan theory. after Sukuna kills Gojo in Shinjuku his body doesn't just disappear, and later Yuta ends up copying Kenjaku's cursed technique (the body-swap one) specifically so he can take over Gojo's corpse and use the Six Eyes himself against Sukuna. Shoko actually explains in the manga that the Six Eyes are physically part of Gojo's body, not a technique you can copy or inherit normally, which is why nobody could just "become" the new Gojo the way people theorized. it's in the final arc, i wanna say around chapter 261-262 but don't quote me exactly on the number. definitely got explained on-page though, not something fans pieced together.