I don’t think the disparity is limited to STEM employers or universities. Go to any bank, law firm or business and the majority of the top execs and partners are male. White males. Law schools have been graduating classes with 50%male/50%female for decades and there hasn’t been much movement at the top.
Our daughters have to do what we did - fight for our positions, salaries, projects, awards. Try to keep everything public such as meeting, business travel (there are books about safe business travel for women), cc’ing superiors on memos to get credit for work. Hopefully, as we’ve raised our daughters aware of these issues, we’ve raised our sons to be more aware too.