@Strugglingmmumm I am in the same situation as you, you have my sympathies. My child told us at the age of 18 that she identifies as transgender, gave us a couple of weeks to get used to the idea before asking us to change our usage of the English language and deny reality by playing along with her beliefs that she has a gender that she was going to change.
We have succumbed because we dare not upset her and don't want her to cut us off (although, given that she needs our support - emotional and financial - whilst at university, I'm almost tempted to rebel against the demands that I fall in line with gender theory).
You are in an incredibly upsetting and conflicting space, you love your child and want the best for them, you want them to be happy. The problem is that between parent and child, the way to happiness/ contentment is radically different. And we parents obviously think we know best, our kids think they know best and there's no viable compromise with this issue.
Certainly with my own child, he is incapable and unwilling to discuss gender ideology because he knows that we do not agree in theory. So he understands any possible discussion to be an attack on him, therefore #nodebate. There's no news or politics talk in our household any more.
My child started hormones a while ago and although I see no discernable changes yet, he feels different and happier in himself. He saved up money from a part time job, student loan, our contribution towards his living costs to get himself a private consult with one of those online gender "specialists". They gave him the initial prescription and his ever so woke supportive university GP practice has continued to give him his prescription via the NHS. So don't be lulled into thinking you have/ your child has years to think about things before medication is available. I also know of a teen who has been buying illegal hormones online for several years :(
I struggle to reconcile myself with my child's actions, because I think he's doing damage to himself. But I'm powerless to change his mind. I don't find it easy. Am I comforted that my child is currently happier and more at ease with themself? Not very, because I think my child is deluded and I fear he will come to even greater upset and disappointment eventually.
I too would recommend Bayswater Support group, there are lots of parents going through what we are going through (many with university aged kids like ours, not just minor children).
@Piggywaspushed thank you for your insight. What you've described is your sibling transitioning as an adult? In their 40s? If I've read that correctly. A very different circumstance from a young adult, in a period of their life between being a child at home and living as an adult away at university, still supported by their parents, not independent in many ways. A very different situation from that of the OP and their child.