The first mutant we see in the movie to get “transferred” was a mutant with regenerative powers. Apocalypse transfers his consciousness to this mutant.
I submit, for your consideration: Poe Dameron survived the Tie Fighter crash because he is a mutant with hyper-regeneration and ages extremely slow. Star Wars happened a long long time ago. Ergo, Poe was absorbed by the Sith Lord Apocalypse on Earth in the times of ancient Egypt.</p>