That's rough mate, she's your mum and you need her to be supportive. Christmas is symbolic and she's not even going to try at Christmas. You're her daughter and you deserve to have her support. You don't need to be grateful to someone who is misgendering you, and her thought processes are totally wrong.

Have you checked out !dadforaminute@lemmy.world they're substitute family for people that don't have the one that they need. They're really inclusive