Are you're saying that a child under 10 who has problems accepting their biological sex can be classed as
[a] being trans, as suggested by ' convert them to being non-trans'
and
[b] is experiencing persistent gender dysphoria.
which
[c] justifies medical treatment.
This is a very young age to say that talking therapy has failed, that a child is definitely trans, has 'persistent' gender dysphoria, and that it is therefore now ethical to treat them medically.
In my case, it was the onset of puberty that 'cured' my gender dysphoria - having felt suicidal about it before it happened, when it happened it re-enforced to me that I was in fact biologically female, that I always would be, and no amount of wishing things were otherwise would do me any good.
Having no choice but to deal with it was distressing for a time, but frankly the reality of several decades of monthly periods stretching ahead of you is pretty distressing for a lot of girls, not just the gender dysphoric ones like me.
Sometimes in life there is no way out but through - reality exists, it's not always easy, sometimes it is challenging, and it is not doing children any favours to pretend otherwise.
If they are distressed, as I was, that puberty will confirm them in the biological sex and the sexed body they feel alienated from, it is not a benign solution to suggest that they can ward off biological reality.
They can do it temporarily, with puberty blockers, but then what?
On or off puberty blockers, they will always the same sex they were born into.
If they are lucky enough to have support around them that is gender critical, i.e. critical of gender stereotypes, they can grow up to be whatever kind of man, or whatever kind of woman they damn well want, without any damaging negativity about their bodies being wrong, or needing hormones, or reassignment surgery.