for people wondering about whether it’s true that most children just “grow out of” gender dysphoria, I recommend these articles:

Detransition, Desistance, and Disinformation: A Guide for Understanding Transgender Children Debates by Julia Serano (UC Berkeley biologist, activist)

Reframing “Transgender Desistance” Debates by Julia Serano

in particular the four studies that make the 80% desistence claim were found to have major methodological flaws, see:

A critical commentary on follow-up studies and “desistance” theories about transgender and gender-nonconforming children

Meanwhile there is robust empirical evidence that gender affirming care for youth is safe and effective, and is recommended by every major medical association:

Care, Not Controversy by Ian D. Wolfe (a bioethicist at University of Minnesota)

What does the scholarly research say about the effect of gender transition on transgender well-being? a systematic literature review from Cornell University