I believe there are many cases of studies and research being shut down for being transphobic (looking into detransitioning, suicide spike post GRS, looking into ROGD etc) so in terms of “science” there’s a real bias, and a huge financial benefit to affirming therapists, drs, and surgeons, who can back each other up in peer reviews. It’s certainly not as simple as there being honest straight up facts going on.
There’s also a massive amount of ignoring the high numbers of transitioning girls with a background of autism, abuse, neglect (I believe this was highlighted in the Cass review, and another study in the Netherlands?) and the large number who end up being gender non conforming lesbians. All of this should point towards transitioning being a symptom of an unhappy child with stuff to work through, not a signal to push a child through irreversible treatment that’s likely to leave them sterilised and with a shortened life span (Scott Newgent talks well on this subject).
OP you have my sympathies, it’s a very tricky time. Your dd is an adult, but as we know brains aren’t fully developed until mid twenties, so an irreversible decision now could not be what is best for her in the long run.
I would be as supportive as you can be, but would draw the line at funding any affirmative care, as I believe there would be a huge risk of her believing you to be complicit in this poor decision one day.
I know so many women like me - autistic, now middle aged - who were confused teenagers, didn’t fit in, didn’t know why, who would have been the exact same demographic as the young women now transitioning.
I had what would probably now be diagnosed as gender dysphoria from age 6 up until early/mid twenties. I was allowed to have short hair and wear clothes of my choice without having to adhere to the the strict stereotypes that we now have. In the 80s we had the freedom to go through this period of time without being encouraged to damage our bodies and health, and every single woman I know who also went through this is hugely grateful for that. We look in horror at what’s happening now, and how greedy drs are raking in money for something so obviously a normal, if difficult, phase of so many young people’s lives.