Its honestly become just a crappy label to convince people to consoooom product mindlessly without question. Like with Star Trek, the new Terminator and so many others. SW was better off with its old canon-tiers system instead of this rigorous and unbending one true Disney canon crap that prioritizes only itself for personal gain while rewriting history by pretending the OT had unfinished business or that the "Skywalker Saga" was ever a thing until now, or like how they completely fucked over Terminator just to replace Skynet and John Connor with woke and milquetoast ripoffs for the sake of the Current Year standards.
Pretty much. Most instance of backwards time travel were proven false or were the result of some sort of illusion thing or just part of some non-canon "what if" comic. Only instance of a traditional backwards time machine in old stuff was a non-canon Spanish children's comic from the 80s. The Aing-Tii "flow walking" thing though is you exploring a non-interactive "imprint" of the past which can cause visions on very very rare occasions. But other than that, no real backwards time travel exists as you said, just forward time travel via hyperspace fuckery where someone gets lost in hyperspace and ends up popping out a hundred years later. Other than that, the existence of alternate timelines were alluded to only on two occasions. One was the ancient Darkstaff incident which I covered here before back around when the first Plan IX leaks came out which created a few alternate timelines (however even this was a case of forward time travel, not backwards):
And then there's the info from the SE coverage/summary I've been doing aka the Shitpost of the Gods which I haven't finished summarizing yet (which was the last piece of old media before Disney pressed the reset button) which reveals how the Disneyverse came into being and is confirmed to be the "Fallen Timeline" of Star Wars.