Somewhat related: "The Egg" [2009*] is a fictional short story by American writer Andy Weir. [1]
> You, a 48-year-old man who dies in a car crash, meet God, the narrator, who says that you have been reincarnated many times before, and that you are next to be reincarnated as a Chinese peasant girl in 540 AD. God then explains that you are, in fact, constantly reincarnated across time, and that all human beings who have ever lived and will ever live are incarnations of you. [1]
[1] https://en.wikipedia.org/wiki/The_Egg_(Weir_short_story)
Kurzgesagt adaptation of the story (31M views):