Do you mind restating the order of logic that you used to conclude that Homura is timeline jumping in Canon? Kindof hard to argue properly when our implication arrows are all over the place
It's also possible that in timeline jumping the Wish interpreted it as something "close enough" would suffice, after all
Ok:
For one, I am 100% sure there is an interview stating it, so there's that.
For two: in the show, during episode 10, we see a glimpse of an Oktavia barrier where the familiars are playing guitars instead of violins, since these are inspired by Kyujibo, it means that he is playing guitar, which is a change that cannot be due to Homura's actions, since he's been doing it for years. As such, the only explanation is a parallel universe, and since Homura got in one, why not all the time?
There is also the fact that Madokami says that she saw all of Homura's efforts across her jumps, which seems strange if Homura was resetting the timeline, since there would be nothing to see, so with what was shown just above, you can conclude that Homura jumps timelines and the old ones still exists.
We also have the part of Wraith arc where Homura returns in her old timelines who are now the place where Madokami and the witch of Despair are fighting eternally. Once again, several timelines, don't stop existing when Homura leaves.
And in Magia record, some of the Madokami story reveals that this is explicitly a parallel timeline to canon that madokami isn't subsuming because it may have an alternate answer to their journey, and she doesn't wants to remove that. Showing once again that there is a multiverse.