I don't know if this will help, but... I overheard someone describe me as in "surgical menopause," and something clicked. I can frame it for myself, at least, as being the same as a woman who's had a hysterectomy - it's as if my uterus and ovaries were removed. I *do* know I never had them, but if I try not to focus on that aspect, I can sometimes get past feeling that sense of "fakeness" and instead feel something in common with women who are also struggling with grief and loss and a sense of being robbed of something essential in their womanhood after hysterectomy.
I also very occasionally poke a nose into a board called "HysterSisters" for that reason; I don't post, but it helps to read how cis women are sharing many of the same feelings. (Including, yes, that feeling that they aren't really or fully women anymore.) And to see how they support each other in getting over those feelings.