I don’t know how many were made but i have seen cut film cels from Rogue One and Last Jedi on 35mm. That leads me to believe there must have been prints somewhere in the world.

There was no 70mm Imax on film for rise of skywalker that was confirmed. But i have never been able to find out if Last Jedi was on 70mm film. I know Force Awakens was.

Rise of Skywalker being on liemax was a disappointment but was still the premiere way to see the movie and the only venue consistently sold out.