You can download the Lyra demo project to check how is done. it is an advanced setup but I think is best to learn that system instead of half baked youtube tutorials from people than never finished making a game.
Specifically to your question, Lyra game (which is very similar with how fortnite works) is set up like this. There is a hidden skeleton/pawn that player controls which doesn’t change. This will then drive a visible character, in that case there is the male and female variants. So you can swap this visible character very easily as the functionality of the player character is separate of how the character looks visually.