Even if there aren’t, and I’m sure there’ll be more than just this movie that takes place afterward which substantively deals with the outflowing of the Skywalker saga (which now includes Rey) in the future, Episode X seems logical to stick on this one from what we know so far.
It’d certainly be cool to eventually have a 10, 11, and 12. But we’d need films that are very much integral to the Skywalker thread or line, which Rey now intrinsically is. A Poe movie wouldn’t cut it, but one which largely only features Rey as a returning presence would seem to.