I imagine at least a half of the countries participating in the Olympics being morbidly bad at LGBTQ+ rights and that a biggoted campaign against a sportsperson can cost them their entire career or life adds to the reasons why there’re more of them we don’t see. They phut Muh Mutherland to shame! is a big target to put on someone’s back if not for the state, but for it’s most reactionary citizen.
I don’t know if this specific group has the same distribution of LGBTQ+ folks as the general population, but as a second thought I’m sure the amount of persons being aware of their own sexuality and gender identity or learning them can top their own nation’s metrics because of the exposure to the international sports scene.