Tangentially, I found this from your link. It probably deserves its own post. I wonder what happened to the study they mentioned or if it's still ongoing. https://www.statnews.com/2016/12/20/transgender-youth-doctors-clinics/

Chicago’s Lurie Children’s Hospital, for example, opened its trans clinic just four years ago but already has 500 patients — and a four-month waiting list. Seattle Children’s Hospital opened its clinic in October and immediately got scores of calls. Olson-Kennedy’s clinic, the Center for Transyouth Health and Development at Children’s Hospital Los Angeles, is the country’s largest, treating 725 trans youth from across the western US. Five hundred of those patients are Olson-Kennedy’s.

Her youngest patient is 3.

“It’s not OK to do nothing.”

Not all doctors agree with the approach of Olson-Kennedy and her colleagues. Some think young patients will grow out of their gender dysphoria, or that children should wait until they are 18 to make critical gender decisions. Many would simply like to see data on whether delaying puberty and allowing children to transition at younger ages is safe and healthy for them in the long run.

Olson-Kennedy is hoping to oblige. In 2015, she and three other leading trans youth doctors received the first NIH grant given to study transgender youth. The $5.7 million, five-year study will look at nearly 300 youth, some who received puberty-blocking hormones and others who took masculinizing or feminizing hormones after puberty. Teams at children’s hospitals in L.A., San Francisco, Boston, and Chicago have recruited patients and are now collecting data to evaluate the effect of treatment on mental health and determine how safe the treatments are.

The doctors think the study will prove that early treatment and puberty-blocking lead to far better long-term outcomes, making it easier for doctors and parents to accept that approach.