At this point I would say just open up everything to everybody. Don’t even keep count of how many boys and how many girls try out or make each team. Make acceptance to each team based on skills and ability, just like the military. Come up with a strength, stamina, and agility test, and if a student can meet some proscribed threshold let them on the team. For contact sports come up with a sliding scale based on weight, height, or skeletal age, whichever is appropriate. The added benefit is that we could do away with Title IX.
Then just stand back and see what happens.
Title 9 forbids all that.