I think you have to just be prepared for her not being attracted to your AGAB but also prepared to have a real conversation once that reality sets in for her. If it doesn't work for her, that sucks but that's just the reality of the situation. But it might if time lets it sink in for her. It might, it might not. I hope for the best though.

Edit: I'm also not personally good at relationships for myself so take this all with a very large grain of salt.

Or his trans daughter changing her last name and basically telling him to go to hell.

Or his trans daughter changing her last name and disowning him. How shitty of a dad do you have to be for your kid to turn down that kind of inheritance?