My DD came out as trans some time ago. The GP referred her to CAMHS, who referred her to counselling at school, but she didn't really get on with the counsellor, who told her she was being influenced by others. (I'm inclined to agree, but of course that wasn't what DD wanted to hear.)
She has a close friend from her class who has also come out as trans, who is now moving to a new school, where she will start life as a boy. She told me this, and was somewhat bitter that things haven't moved as quickly for her.
I have explained to her that I will always love her as she is, but as a gender critical feminist, I don't believe that people are innately one gender or another. We have a sex, and then society expects us to conform to the gender that it associates with that sex, whether we "identify" with it, or not. I believe people should be allowed to express their personality and style however they want to, but that it is not possible to change one's sex, and that there is no "male brain" or "female brain". I believe there is no right way to be a girl, and that a masculine girl is still a girl.
I made the analogy to her that she might decide that she is a Muslim, and that would be fine, but she couldn't also expect me to believe in the teachings of the Koran. (I also pointed out that the trans ideology is like a religion, as it is based on feelings.)
Over the past few years I have bought her clothes from the men's wear sections of shops, including pants. I have allowed her to wear binders, until I discovered how restrictive they are, and I have now hidden them away. She hasn't asked for them back, so I have avoided that topic for the moment.
I don't want to encourage her to make too many changes, as I know that many people desist, and she is more likely than not to be one of those people, so I want to make reversing the decision as easy for her as possible, if that is what she decides to do.
My current issue is that she wants to be called a boy's name. Should I use this name out of politeness? Afterall, if she had chosen a different girl's name I would use that. But a boy's name just seems like affirmation that I am accepting that she is a boy.
I think it's worth saying that I am in the process of arranging an assessment for her for ASD. This is something she asked for, having done some online tests. Various family members are "on the spectrum".
Thoughts would be welcome.