Good catch, thanks. I think the government got rid of an older, unwieldy mega-PDF. Here's a more manageable final version.

https://www.federalregister.gov/documents/2024/04/29/2024-07915/nondiscrimination-on-the-basis-of-sex-in-education-programs-or-activities-receiving-federal

This time I don't think it was Biden's fault. He did get these updated rules through, but some Republican governors simply refused to comply and sued, and SCOTUS said "fine, let the lawsuits proceed and meanwhile the federal rule will have no effect."