Another observation, if we had two different timelines that end up in the same exact state, then this could be an explanation on why time isn't reversible: when

Another observation, if we had two different timelines that end up in the same exact state, then this could be an explanation on why time isn't reversible: when we go back in time there's multiple possible pasts, and by looking at the present state of the world we don't know which timeline is the real past (if there's ever such a thing). The many-worlds quantum interpretation says that, likewise, when we go to the _future_ we also have multiple timelines, and nature somehow just pick one arbitrarily, and this becomes "our" timeline. Then to reverse time, perhaps it's sufficient to employ the same mechanism, but in reverse. (Perhaps there's already beings that live backwards in time, it's just that "their" timeline works that way. Like the movie Tenet). Or even, perhaps each time the timeline splits in the future direction due to quantum phenomena, it also equally splits when going in the past, in the exact same way. (Well I'm trying to recover some symmetry here, but not sure if it works)