Like... yeah, that's a superpower, all right, but they gave us absolutely NO clues that such a power was even possible.
And yet, because the show is SO meticulously planned, it doesn't seem forced. You know, most of the time, when time travel shows up late in the story, it seems forced, rushed, just a trope to try and solve all the problems that they've set themself up for. That's not the case here. They introduced time travel in the exact. same. conversation in which they reveal that the brother that they've been hinting at since the VERY. FIRST. EPISODE. does, in fact, exist. Which can only mean that time travel has always existed, and they're finally gonna show us how and why.