i think the fact that ive believed this body wasn't mine from the get-go, for spiritual reasons, has helped, but i will admit that most of my physical health issues started after i ritually accepted it too. not concretely related but sometimes i wonder haha.
other than that, experiencing some strange dysphoria and dysmorphia helped me come to terms with it too? in their own ways. this body will never be able to be what i want it to be, never be able to do what i want it to do, because it's a human body and those aren't designed for what i'd like of a body. so i see it even now as more of a vessel i inhabit... one i can customise with hair dye, makeup, tattoos, costumes, and hopefully more someday, but still not "me" you know? me is something more than just electricity moving around some meat. me is an entity, my body is my ship. it very well may be the only one i ever get, so taking care of it is important and makes existing less bad, but it's still just where i live at the end of the day.
there's an aesthetic called "cripplepunk" (with the intent of reclaiming the word) and the basic ideals of that are something i like to play with. i'm not a great punk but it's nice to embrace the "my body is MINE and you can't tell me how 'healthy' looks for me". that helps too. it's kind of in line with radical self-acceptance.
i also think it's important to let yourself hate your body a bit. you can be mad at it. you can be frustrated and confused and distressed by it. don't take that anger out on it, forgive it for its problems, but letting yourself feel those negative things about it is just as important as accepting and loving your body. trying to deny yourself those feelings can just make them worse after all. i think a lot of people forget that when they try and practice self-acceptance and self-love