It looks like Notre Dame doesn’t offer a BM or a performance degree and doesn’t require auditions for music majors.
I don’t know Notre Dame specifically, but I’ve just done college admissions with my music kid who is still deciding between a BM or a music major at a non music school, so what I’d say is…maybe. There are two very selective schools where we’re pretty sure his music supplement was a big factor in his admission. At both of those schools, music faculty reached out to him after his acceptance, and at one the orchestra director straight up told him, “I advocated for your admission.” But there are plenty of places where he didn’t get in as well, and at a lot of his acceptances music really didn’t seem to be a deciding factor, as far as we could tell…like I’m sure it was seen as a strong EC, but nothing more than that. So I think it’s tough to predict; some schools really prioritize music and filling orchestra seats, and some don’t…and of course some years there are more openings on a given instrument than others. If Notre Dame is indeed looking to grow their music department, it could be a very good time for your daughter to be applying, and a music supplement could help a lot.