I am going to get terminologies wrong here... soz in advance.
Friends gown up daughter-at-birth has recently had top surgery to become trans. She has used pronouns 'they/them' for a while and continues to consider themselves non-binary.
I don't understand how that works. Surely if you are trans you have changed from she/her to he/him not she/her to they/them.
Does one transition to non-binary?
Genuin question...