Relax.
9/25 is a motivating score for a 4th grader. But the problems get harder later in the test, so there's still a lot to learn before being a "master" of Prealgebra (AMC 8).
Keep going through Beast Academy if she enjoys it, and then Prealgebra and beyond. (Warning, Prealgebra is a lot less "fun" for little kids than Beast Academy, which causes many kids to stop for a year or two and then pick it up again in middle school, unless parent is strongly guiding).
If the kid is willing to work outside of school, then you don't need to jump 1,2,3,4,5 years ahead immediately. Let the kid progress through the material at their own pace, which might be 1-2 "grade levels" per year (especially if she keeps working through summer), or might not.
In FCPS, for most students, the Alg 1 HN in 7th path is high enough. If your student is "beyond school", you need to study at home, because school won't go anywhere close to what the mathy kids can do at home (and/or external private classes). If you get through geometry at home before the end of 7th, then summer geometry clears the credit requirement.
There are many students in FCPS who are doing boring review of math in school, while their real math education is at home. (At least 100 per grade)