Ok. Good luck with that then.
Let me tell you our story. My DC is autistic. Has always found people hard. Had a difficult time in teenagerhood and a huge mental health crash at sixth form. I was aware of gender discomfort in mid teen years and ignored it in the hopes it would go away....and it apparently did, and I patted myself on the back.
We then had 5 years of DC living in their room, up all night, asleep all day. Refusing to bathe. Eating rubbish. Taking maybe 200 steps a day. They became overweight. We tried sertraline, counselling, there was a depression diagnosis. DC literally did not leave the house, ever.
We got a PA via social care and gradually there was some improvement. After a year we achieved going swimming and out for walks with the PA. Still refusing to wash, still often asleep most of the day.
Then we had another crash. DC was 22, almost 23. Back to refusing to leave the house, curled in fetal position. Eventually revealed that they have been struggling with their identity for years and years. Do I think they were radicalised online? Absolutely. But we are where we are. They were fed this stuff at school as facts, don't forget. I am completely for taking trans teaching out of schools, except as a factual "these people do exist." You tell a bunch of autistic kids that if they don't feel like a "proper" guy or girl then maybe they aren't, you are going to get this result.
So we told them we will always, always love them. That wearing clothing or changing their name if they want to is up to them, they are adult, but we would please request nothing permanent is undertaken until we see a specialist. They cried. They were convinced we would throw them out or hate them (more shit from online). My DC doesn't do hugs, they have sensory sensitivity and find them very difficult. That day was the only time I recall my DC giving me a spontaneous, initiated-by-them hug since they were about 5 years old.
They chose a new name which is a version of the name they would have been called if they had been born the opposite sex. They were given a middle name after one of their parents; they chose the middle name of their other parent as their middle name. Their third name was a gendered name named after a dear friend who died shortly before they were born. They have kept this name, despite it being the "wrong" gender, because of that. So their names are not silly names plucked from who knows where as a romantic hero or a star or something. They are names that clearly show a deep connection with their roots and family. They are not rejecting us.
Anyway, since this was accepted we are seeing change. DC is now up every morning having chosen to take on a certain responsibility (think, walking the dog). They have started talking more. Their bedroom is tidier and washing is now put in the basket. They have taken on a small voluntary job (along the lines of mowing a neighbour's lawn). They are just happier and more functional. They know they don't "pass", they know they aren't actually the opposite sex, they don't use services for that sex. But they know they are accepted and that seems to have made all the difference. They are out walking, cycling, and going to trans swimming sessions. Their friends (they have 2) have accepted the change.
I don't know if it's the demonstration of acceptance or that they feel more real. I don't know if it will go on forever. If they said tomorrow "actually, I don't need to do this" I would be delighted. But it's worth it. They were being consumed, and now they are, very slowly, unfurling.
Now imagine I had said "it's all rubbish. You will never be a woman /man". You don't understand the depths of despair my DC was in, for years. I simply couldn't. And I really think any parent in that situation couldn't. It wasn't casually dropped in or casually undertaken. They agonised, for years.
And yes it's been bloody hard as a parent. Took me 6 months before I could physically say that new name. DH and I have grieved - grieved - for the child we had.
People come on here with their certainties and their simplistic views and they have no bloody idea. I challenge you to look your child in the face at their lowest and most vulnerable moment, when they reveal what they believe to be a massively significant aspect of their identity that they fear could lead to them being ostracised or rejected or thrown out, and say "Women and lgb rights matter, you will never pass or be seen as what you are not".