Fewer females in certain majors

You may be able to find information indirectly. For example, Harvey Mudd, a STEM oriented college, recently accepted 9% of male applicants and 24% of female applicants: https://nces.ed.gov/collegenavigator/?q=Harvey+Mudd&s=all&id=115409#admsns.

Regarding your daughter’s college search in general, you may want to seek out a *Princeton Review/i sampling, “Great Schools for Mathematics Majors,” in which an appealing mix of liberal arts colleges (e.g., Haverford, Amherst, Hamilton, Williams, Bowdoin, Pomona), universities (e.g., UChicago, Harvard, Brown) and predominately tech-oriented schools (HMC, MIT, Caltech) appear.