Sorry about this being a bit later, got pulled away by my wife to go to a game.
Ok, I suspect it can be a bit of both. I know
@HarlemHottie and I both mentioned we remember our lucid dreaming early in our lives. 5 for her and 6 for me. So that makes me suspect it’s something we were pretty much born with.
Though, it’s also possible to learn how to lucid dream through training and learning to use specific events in a dream to recognize it as a dream. One main cue is the light switch. In a dream, light usually won’t be affected by its switch. So, you can use the cue of trying to turn a light on or off as an in-the-dream wakeup call that you’re dreaming.
I normally consider early ability in lucid dreaming to be a
possibility,
but not a certainty, of reincarnation being real. So those of us who know how to do it as young children may have learned it in a previous life. Again, that is only my speculation on it, and not me saying it is the actual truth.