As thumper1 says, it is possible at many colleges to major in something other than music and still have a rich musical life, with lessons and extracurricular performance.
At Notre Dame, it does look as if students can combine music and another area of study pretty easily, if that ends up being a direction she wants. And they added a music minor.
By the way, I know students with doctorates in music who haven’t played an instrument in years! Many ways to be involved in music.