I think you need to dismiss the idea that the D1 school is beneath her academically. Most flagships give a pretty good education for those who put in the effort. One DD attends one that is ranked lower on the USNWR scale but we have found nothing but nice, dedicated students who are always being recognized for academic achievements as well as sports.
My other DD, who is the athlete, looked at a wide range of schools from smaller D1 to academically elite D3. She wanted a balance of athletic and academic fit. And she wanted to play, not just watch. She could have gone to a D1 school and the team was ranked in the top 20 in the sport this year. There are over 40 kids on the team, and most of the freshmen don’t play, or play 5 minutes of one game (I think her friend played less than 10 minutes total this year). Academically, the school is weak (IMO) and not right for my daughter. Other D1 schools that offered her a spot were much smaller, in small towns, and also not for DD. Many people thought she was nuts for not wanting to go to the more elite D3 schools, but DD doesn’t like the LAC model of schools. She found a D2 she likes. I’ll add she didn’t find this school until late July before her senior year. She didn’t tour the school until September, didn’t accept until Nov, and many schools were still contacting her. Your daughter still has lots of time for most schools.
Your daughter might want it to be ‘over’ but it is, of course, not really over until she’s accepted to the school and/or signs a NLI. She doesn’t want to go to the small school her brother attends, so let that scholarship go. There will be other offers. I’d have your daughter ask a lot of questions about how often the walk ons make the team, whether they are expected to follow all the same rules, if they can live and eat with the team, how many get scholarships in the following years. Will she be on the team, or just part of the practice squad, always trying to make the team? In football, there are 30 or more non-scholarship walk on students, but they don’t normally get to travel with the team or even dress on game day.