This data is really not new at all.

Levels of Satisfaction and Regret With Gender-Affirming Medical Care in Adolescence

We have also known that detransition is largely caused by external factors, not "turning out not to be trans":

Factors Leading to “Detransition” Among Transgender and Gender Diverse People in the United States: A Mixed-Methods Analysis

Edit: I really don't know why this comment looks so broken in Photon. It looks fine on the default Lemmy UI.