There are also hockey prep schools that aren’t in the north east. Culver in Indiana, Shattuck-St. Mary’s in MN (and gee, many Minn schools are known for hockey).
But she certainly has the opportunity to go to college on a hockey scholarship from her current hs and Tier 1 teams. She needs to network with her coaches, go to camps, contact the college coaches where she’d like to play.
Even if she doesn’t play on a college team doesn’t mean hockey stops at hs. My daughter just played on local rink teams in hs (she was awful) but played on the college club team for 7 years (undergrad and grad school), and now she’s been playing on a rink team for a few years.
You can also pull the rosters for any college team she’s interested in attending and see where their players went to hs, or if they played on a club team (sometimes you have to read their profiles to figure that out), if they transferred from another college. Again, look at the midwest as many of those schools are cheaper, are Yellow Ribbon schools where she may get money from her parents being military, and may have vet school affiliations because of the areas they are in (Wisconsin is known for hockey and cows).
Good luck.