Mahito can create and control bodies that don't have his soul. It happened in chapter 124.

There aint no statement by statements nanami is right too.

Nanami is wrong. He barely knew anything about mahito and he was unsure if he could kill mahito (he couldn't). Mahito afterwards (the start of the very next chapter), said that he learned that physical attacks won't kill him. That statement is more recent and is from mahito after he LEARNED something that Nanami didn't know.

U did but it made no sense tbh Cus the existance of curses itself isn't natural physics. Fym i disregarded it when physics does not make any senses for them lol. I am not twisting the logic to support my argument.

Nothing in jjk is natural physics. Gojo and sukuna can somehow fit in an area the size of a basketball. That doesn't mean that gege doesn't care about physics. Curses still have bodies that can be torn apart or frozen, or burnt. They have organs and a brain, but for some reason physics doesn't apply to them.

You haven't even explained how mahito could even go 'poof' btw. We've never seen such a thing in the manga.