I haven't studied the issue at all? Then how come Google AI reports the following:
Several major international, national, and collegiate sports organizations have implemented bans or strict eligibility rules that restrict women's sports categories to athletes assigned female at birth:
• International Olympic Committee (IOC): Announced a ban on transgender women from competing in women's events starting at the 2028 Summer Games in Los Angeles, requiring a mandatory genetic screening test.
• National Collegiate Athletic Association (NCAA): Limited women's sports competition strictly to athletes assigned female at birth.
• National Association of Intercollegiate Athletics (NAIA): Approved a policy stating that only athletes whose biological sex assigned at birth is female and who have not undergone hormone therapy may compete in women's sports.
• U.S. Olympic & Paralympic Committee (USOPC): Barred transgender women from competing in women's sports categories.
• Individual International Federations: Stricter rules barring transgender women who went through male puberty have been enacted for specific sports including World Aquatics (swimming), Union Cycliste Internationale (cycling), and World Athletics (track and field).
• State High School Athletic Associations: At least 25+ U.S. states have enacted legislative bans or athletic association rules restricting transgender girls and women from participating in girls' or women's school sports competitions.
You're burning a straw man -- "existing anywhere" is not the issue. Men/boys trying to pass as biological females shouldn't participate in women's/girls competitive sports. Males' biological advantage is obvious in key categories (skeletal structure, muscle mass/strength, and cardio capacity. That's why I call it an (unfair) intrusion on bona fide female competitive sports.
Skin color shouldn't be relevant, but Gayle King of CBS expressed shock that the lone holdout was a black man. That's the old liberal stereotype that blacks should think and act a certain way, and it probably explains why some of the nine white women (Karens?) gave Desronvil such a hard time for not towing the liberal line.