Plenty of time as long as she takes her corrections to heart and.......
There's an old joke that asks the question; How many psychologists does it take to change a lightbulb. The answer is one, but the lightbulb has to want to change.
I'm sure she wants to change in the context of getting her skills and having confidence in them, but the change she needs is to understand that she can decide to change, and in a big way, the part of the skill the coach is probably begging her to change.
If she nibbles on the coach's corrections she'll probably get these things with 2-4 weeks to spare, but she could take one big bite on the correction, chew on it for a week, and spend the next week enjoying dessert.
Gymnastics is easy, but believing and having faith in your ability as well as the coach's is the key to making it easy. Well, that and a whole bunch of strength training, stretching, and wanting to do it so badly that changing is your first thought and priority when you get on a piece of equipment.
End of sermon.