So far, you haven't named a single time you cared about Ivy League women's swimming before Lia Thomas became news, you just let that drop. You haven't acknowledged you were wrong about NCAA records. You haven't mentioned how women's Ivy League sports would be destroyed. You haven't mentioned that trans women on hormone therapy lose most of their advantages from their birth gender.That would be silly. The open division accepts everyone regardless of genetics. Verification of some sort would only be needed for those competing in restricted divisions. If you had a kid in club sports you'd know they do that now. For my kid to eligible to compete in the 10U division I had to provide proof of age. Genetic tests for gender only aren't any more expensive than tests for banned substances and athletes have to take many of those throughout the season. Testing for compliance in sport is not the least bit unusual.
Women's sports are not "restricted divisions"; they are segregated for social reasons. You're just trying to rationalize a decision based on hate.