LAC’s tend to be very LGBTQ+ friendly, but since most are 2000ish students, the dating pool is quite small. If that is an issue for your D23, then the schools that are near other schools (e.g. Pitzer, Haverford), near a city (e.g. Macalester) or women’s colleges, or bigger than the usual LAC (e.g. Asheville) are good choices.
Also, it seems like your D23 is going to have some excellent choices given her academic record, so you might end up shopping for the best financial deal. If so this thread might help your search: