I think an audition prep team could still be helpful even though her prescreens are in. First, there are some schools that accept late prescreens so she could potentially re-record. Second, she doesn’t have to do the same material in the actual audition that she submitted in the prescreens. There have been many comments over the years of kids switching up their songs or monologues half-way through auditions because they weren’t having good luck in the beginning and then doing better with the new choices. A coach or prep team with a lot of experience may be able to offer some perspective on song and monologue choices for upcoming auditions (or retaping of prescreens).
Also, a comment on the being older issue. Especially because of the pandemic, many kids decided to either defer a year or take a gap year because they didn’t like their options. I know there are many kids in my daughter’s freshman class who are 1-2 years older because of this. So, if it comes to it and she decides to take a gap year (which I don’t mean to imply will happen because it’s still early in the process), she will not be the only “older” kid in the program.
Good luck. Feel free to private message with any specific questions. I feel like I got a PhD in this last year after going through this, at times, miserable process!