There's an initiative on the ballot in Washington State to keep trans people from playing girls sports. It's a complex issue and I'm pretty sure it shouldn't be legislated. Trans people should be able to play sports somewhere.
The big issue is that adults have no clue about kids and sports. The adults involved in youth sports are mostly on an ego trip to fulfill their own unrealized ambitions when they were kids.
So I think there should be no adult involvement in sports until the professional level. Up through college: no parents, no coaches, no referees. Kids, youth, young adults, should be running their own sandlots. NO ADULTS ALLOWED!