It's an artifact of undertesting and restricted access to testing. In Nigeria, where the virus is endemic, they clearly have seen and documented its spread via airborne particles to any sex of people for decades now: https://www.nature.com/articles/d41586-022-01686-z It's silly how quickly people have ignored all the data about it from Africa because it seems to be inconvenient.
The MSM community is the first major non-African cluster just like the Wuhan market was the first major cluster for COVID-19. People saying it's not a threat to the non-MSM community right now were like people who said "oh it won't spread outside China" to COVID-19 in January 2020. The virus doesn't care about your sexual preference. If you have the right cell receptors and come in contact with it, it will attack and infect.