And who decides if a puberty is "wrong"? The child itself certainly isn't mature enough.
Given the definition of maturity is being fully grown, this comes across as an inherently unhelpful thing to ask. If we say “only once someone is fully grown they are able to determine if they experienced the incorrect puberty” then this makes it impossible to help children who are going to experience the incorrect puberty. Unless we have some way to determine a child is trans without any input from them, there becomes no way to help them.
What's next, gene therapy because the embryo might want to be a different race when it grows up?