I rather suspect 'female and non-binary groups' are aimed at being all female sex, but to include females (who look female) but who identify as non-binary. I don't get the impression these groups really want non-binary males turning up.
This person would look at first glance look like a male, and they have deliberately paid the heavy price of having an endochrine imbalance and early menopause to look male, so obviously being perceived as male is very important to them. Its a bit piss taking to now get upset because people are not reading her as female.
And I suspect this is what this is about. After transitioning, this person has probably found that they don't really fit anywhere. I doubt they are able to form friendships with men as a man. because men can tell she is not really a man. Even if she physically passed better than she does, they would still be able to tell she was 'different' even if they couldn't quite articulate how. She probably craves female friendship and companionship but now finds herself unable to enter these social spaces as a woman to be able to form these friendships.
She's probably found herself in a hinterland where she is, within society, not fitting in as either a man or a woman, (actually, I can now see why that has led her to conclude she is non-binary, within her conceptual framework). And instead of realising its the choices she has made which has led her to this hinterland, she is blaming others for not being inclusive enough.
I feel quite sorry for her. She's been sold a lie about the 'authentic self' = true happiness', and now is finding its made her life harder.