This one right here.

Much respect to George, but I just can’t see it. Maybe he will write it in a way that makes sense… because the show didn’t expand on it at all, and you can even argue that the Three-Eyed “Raven” has nefarious motives.

Back on the site that shall not be named, when the show ended, someone shared an edited clip of Bran and Jon saying goodbye, and when Bran says “why do you think I came all this way?” you see a montage of things he did with ominous music. I will take that as show headcanon.