A few thoughts.
Most state HS federations don't sponsor the hammer throw or javelin due to safety and facilities issues for high schools, so the talent pool (nation-wide) is weak compared to discus and shot put throwing events. You'll want to find a way to convert the HS weights to college weights (or better yet, have your daughter get some marks with college weights) to see where she would be performance-wise at a college she is interested to attend. Look at the results from a recent conference championship meet and what marks in the discus, SP, javelin, hammer would score points. Or see what marks would get her to qualify for the NCAA D1 (regional qualifying championships). Either is a good benchmark to be considered for an athletic scholarship.
There are more scholarships for women than men, but some schools don't fully fund all the scholarships they can. They tend to give preference to a sprinter who can compete in multiple events or a distance runner who can also run XC in the Fall. Further, some head track coaches tend to prioritize having strong/deep teams in certain events (sprints, jumps, distance, multis).
Assistant coaches don't get paid that well, and they tend to move around, so there's not much you can do about a good throws coach leaving after your daughter starts attending.
Ask your daughter's HS coach for some recommendations on schools with good throwing coaches. If they don't know they should know other HS coaches who would have ideas. Otherwise, ask a coach at a local college for some ideas.