So many variables here. Any idea what her primary corrections are? Why specifically it is she isn't scoring up closer to the 9.0 range?
For a lot of girls it is something like overall "tightness" that just gets dinged to death and adds up. That can definitely improve with maturity (body control) and more conditioning. Or it could be something like amplitude and angle deductions in jumps and leaps, which will also improve over time with practice. Those can take a while to develop.
Between the ages of 6-7 and 8-10, there is often a world of difference on overall control like body tightness, as well as the strength for higher leaps/jumps, and more fluid swings, etc. If you are in a decent program, I would expect to see noticeable improvement over the season.