There was an recent news article about how J.K. Rowling managed to do what you suggest: https://www.washingtonpost.com/opinions/has-jk-rowling-figur...
The "transphobia" purity spiral is absolutely maddening, it just hasn't eaten itself completely yet. The current orthodox view inside of it is that anyone who claims to be trans is trans, regardless of their biological gender, psychological gender, gender expression, name, pronouns, or gender dysphoria. So a person who was born female, is female, presents female, uses a female name and female pronouns can still be trans simply by virtue of her saying that she is. Anything else is "gatekeeping", and expressing this view is "transphobic", and sentenced with immediate purity spiral mob justice.
I'm hoping this spiral dies out quickly, so that the LGBT movement can go back to sanity, it's not in a good place right now.