She may also, just be trans. In which case it would be very damaging for her for you to deny her gender affirmation
No. This is misinformed nonsense.
Very, very few children fit the profile of those who maintain they are trans throughout puberty and into adulthood, left to their own devices. And most of them start saying they are the other sec much younger than the OP's DS, and even then, the jury is out as to what is actually going on.
The vast majority of kids who think they are trans are caught up in a social contagion. Most are same sex attracted and autistic or have autistic traits. (According to data from GIDS itself. They didn't record much, but there did at least record this).
You mention danger?
The very real danger here is that the OP's child is actually gay / bisexual but struggling to process it, but instead of supporting him to accept his sexuality and flourish as a same-sex attracted adult, a plethora of well meaning idiots like yourself push the trans narrative on him, and he ends up sterile, in pain, incontinent and unable to ever have a functional sex life as an adult. A eunuch, effectively.
Evidence is emerging that puberty blockers can cause a significant drop in IQ. Young people taking them experience this as "brain fog". They also cause brittle bones, and when started young and followed by cross-sex hormones lead not only to sterility but the suppression of sexual function and desire to the extent that many kids on this pathway never mature into sexually functional adults.
In boys this looks like the genitals staying sexually immature - a child's penis as an adult and no sex drive. And if they go for surgery a "neo vagina" would have to be created out of other bits of the body for example a colon, rather than from the penis itself as in the surgery adult man who have never taken blockers can have.
On a young person who has never sexually matured, such a neo-vagina gives them a hole that can allow them to simulate sex with another person "as if" female but at what cost? If they haven't matured sexually, and their "vagina" is made of colon, it's all about aesthetics over function, they have no hope of a fulfilling sexual relationship. Look up Jazz Jennings if you don't believe me. There's a video of him about 18, asking his grandmother to explain what an orgasm is, as he fad no clue.
Ask yourself, what kind of adult waits to have sex with someone who can never hope to feel sexual pleasure from it? I don't like a lot of the answers to that question. Why would you push a child towards this possible future?
The neo-vagina itself is effectively a wound that wants to close, and is prone to infection, and so it must be dilated, a painful process. Many people who have undergone this procedure struggle with incontinence issues.
Even the prostate is moved so they have no hope of having normal gay sex.
It's a fucking tragedy, what a difficult and lonely life we are setting up so many "trans" DC to have, denying them the chance to ever form a relationship as a fully functional sexual adult.
And it's an outcome that can be easily avoided. All the data shows that if they're not medicated, the vast majority of children grow out of being trans if allowed to go through puberty.
The Cass Report has stayed that social transition is not a neutral act, either, as it puts children on a path to medical transition.
Please, please go educate yourself on what you are actually advocating, it's horrific, a medical scandal unfolding in real time. The practice of stunting the sexual and intellectual growth of mostly autistic and same-sex attracted kids will not be looked on kindly in years to come.
Remember, people used to advocate lobotomy, as people they trusted told them it was a good idea. It was all the rage for a while! This is has parallels. Trendy, no evidence base, those unlucky enough to be duped will end up with serious, irreversible damage at the hands of well meaning professionals
Read some actual evidence based information, not the lobbying of organisations with huge bias.
I would suggest starting with the Cass Report, followed by the excellent "Time To Think" about the collapse of the GIDS clinic, written by Newsnight's Hannah Barnes - available here ttps://amzn.eu/d/a7hPqr4