I got a scary thought.
To plenty of children, puberty would be gross and scary, not just because of the bodily changes but also the mental changes, down to being more romantically and erotically interested.
These days, the pro-trans crowd a really pushing puberty blockers on children in case they go through the 'wrong' puberty. The idea is tha they 'pause' puberty until they decide if they are cis or trans: the cis would cease the blockers and le their bodily hormones return whereas the trans would get opposite-gender hormones. Overall, they push that puberty blockers are harmless and temporary.
A child would think that puberty and all of its troubles can be avoided. These days, the child would not even eed to say 'I'm trans'; the pro-trans crowd would be totally fine with giving the child puberty blockers forever. They would even furiously 'protec' the child from 'TERFS' who logically oppose the child taking such drugs.
Let u stay away from the possibility of the pro-trans crowd hypnotising the child in this vulnerable state. Here, the child, while initially happy, would eventually suffer from the unnecessary side-effects from the drugs on top of the ways a delayed or averted puberty, a natural, biological process, would hur the child's body. Also, since puberty affects the mind, this may also cause mental problems or at least immaturity from the perpetually averted puberty. The child would be trapped; on top of the permanent changes the child has gotten through the stopping of puberty, the pro-trans crowd would not wan to le the child stop taking blockers, despite wha the child says. They will insist on 'protecting' the child from 'TERF rhetoric' then forcing him to take the blockers... or, worse, become a genderspecial troon.