Can’t speak for fencing specifically, but most of the schools on the list are NCAA Division III institutions, which are generally pretty open to walk-ons.
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Brown and Lafayette compete in NCAA Division I, so they are more serious about athletics. However, Lafayette is very small for a DI school; they are basically a liberal arts college that offers athletic scholarships in some of the higher-profile sports. They do not offer athletic scholarships in fencing, so I suspect that the Lafayette fencing program, while technically DI, is actually not much different from many small-school DIII programs.
My guess is that a 33 ACT gives your D credibility as a prospective applicant at any of these schools. I think it would be OK for her to email the coaches and ask if participation on the fencing team as a walk-on is an option. She should indicate that she is not trying to be recruited as a fencer, or seeking a tip in admissions.