Who knows. Maybe in the AU Regina is never forced into marrying Leopold at all. Maybe Snow’s mother remains a brat and she’s the one who kills Leopold and because she’s raised Snow to be bad as well, they throw a party instead of his funeral. Maybe Snow marries James instead of Charming. Or maybe Regina’s the one who gets set up with Charming after James still dies, and then Robin comes along to rob their carriage. Maybe Charming stays on the farm and there’s this Marian girl who lives on the next farm over and they end up together. They could do just about anything. PS. Welcome to the forum.
Ha! Well, we at least know Regina is the Queen since…fancy carriage.