Thanks for sharing your stories and experiences. I’ll tell you a bit about myself. I am a single trans woman. I do not have kids. I have not undergone any surgery or used any medicine in order to transition. I knew I was a girl when I was three years old. I am sure your friends knew their genders at a young age as well.

Hormone blockers are a safe and effective way to delay puberty. It is completely reversible because a person can stop taking the medication at any time to begin puberty. This is something that a child of the ages ten to eleven can understand and consent to. Hormone blockers are not equivalent to sex which is something only adults can consent to. None of the medical treatments prescribed to trans people are forced on anyone. And only people with a history of gender dysphoria are given access to these treatments.

If you don’t like Mayo Clinic, I can give you another source with the same information.

https://www.medicinenet.com/at_what_age_does_gender_identity_develop/article.htm

https://www.stlouischildrens.org/conditions-treatments/transgender-center/puberty-blockers

It seem like the health and well being of young people is important to you. I would recommend reading this article on gender-affirming care. I think it will address many of your concerns. For some trans people, medical transition is not even necessary.

https://www.columbiapsychiatry.org/news/gender-affirming-care-saves-lives