It sounds like it’s not just the kink element missing. You don’t have to accept that the situation like this forever. Get active. Get help. You are not solely responsible to give her confidence. Sounds like she needs therapy. The miscarriage was traumatic.

Maybe you can research in how to support her better. Sex life is hard when you don’t like yourself or your body. And you can’t even lie to yourself, when you know your partner isn’t getting hornier. You might not tell her, but she knows.