It's hard to give an exact time as it depends on the manga's plot development. But typically, Yuta Okkotsu shows up when certain events and character arcs lead to his introduction.
I think Yuta Okkotsu's age in the manga is around 16. But it might vary depending on specific story arcs and developments.
Sure, Yuta is part of the Jujutsu Kaisen manga. He plays an important role in the story and has some significant moments and developments.
Well, one way this could work in a fanfiction is that Naruto could use Yuta's powers to enhance his combat abilities. Yuta has some really unique and powerful cursed energy techniques. Naruto might be able to combine his chakra with Yuta's powers, like using the Rasengan with Yuta's cursed energy for a super - powered attack. It could make for some really interesting battles against tough opponents like Madara or Kaguya.
Yes, Yuta is featured in the manga. His presence adds some interesting elements to the overall plot.
I'm not sure. Maybe it's part of the plot development or there's some hidden reason yet to be revealed.
Yes, Yuta does come back in the manga.
Kawaki makes his appearance in Boruto manga at a specific point, but I can't recall exactly. You might want to check the official manga sources for the precise chapter.
Yes, Yuta is in the Jujutsu Kaisen manga. He plays an important role in the story.
Yes, Yuta is alive in the JJK manga as of the latest chapters.