You can't win the argument over being too young. A very common trope is that, "Our child let us know they weren't a boy/girl before they could even speak."
It's always interesting how people will assign meaning to things like a little girl playing with a truck or a little boy playing with a doll, when the kids almost certainly have no concept. It couldn't be that the little girl just likes trucks. Nope, she's actually a boy.
Such is the case with this 10 year old trans runway model.
It may or may not be worth noting that this child in question has an infant sibling that their parents refer to as a "theybie". Both parents are trans as well.
Then in another argument across town, a feminist will insist that the whole concept of there being boy toys and girl toys is absurd. Toys are toys and let kids just play.
Who is correct? Nobody knows.