I think where I’m getting hung up on, as far as “Rey Palpatine/Clone is a lie/unconfirmed in-universe” is that as it stands is that we don’t have mock-ups of these ideas to see them play out in practice. Going over the past posts, the idea that Rey’s visions not being part of her childhood but Palpatine sending her specific images to manipulate her is a bit of a hard sell since we haven’t written a version of the hangar scene where Kylo tells her that’s what’s going on (not yet anyway).
I do like the idea of every time the Palpatine reveal comes up after the scene itself if people cast doubt on it (new lines for D-O, Luke saying “because of Palpatine” instead of “because you’re a Palpatine,” Finn telling Rey she knows the truth that Palpatine’s not her family, etc.) but I’m concerned there’s still too much evidence that points to Rey Palpatine being true.
I followed development of a Palpatine-less edit of Episode IX called “A Spark of Hope,” and one idea the edit toyed with was having Rey narrate the summation of her journey while burying the lightsabers. It ultimately went in a different direction, but it would be a clean way of having Rey state “whether what the Emperor said was true or not doesn’t matter. What matters is the future & moving forward” or something like that.