At least the young person is in early 20s, and not a teenager.
When my nephew asked to transition (male to female)- he was 17. Family, doctors, friends, all tried to stop him and tell him to wait. He just said that if he wasn't helped to achieve what he wanted, he would kill himself. After 2 suicide attempts, one that almost succeede- they had to agree.
The good thing is, 12 years hence- that doing it so young means he never had time to develop male features, voice, Adam's Apple, etc. Now married to a lovely many- you could never ever guess, unless you knew, that she was born male. And very happy, in female profession, without any issues.
Disappearing contributors - part 2
