In the meantime she is going to start privates one day a week with a focus on uptraining. I understand the marathon aspect of gymnastics, but immediate goal is more to keep her interested and challenged. Frankly I’m not sure my daughter has much of a future after puberty; I’m 5’9 and my husband is 6’2 so a big growth year is probably in her future.
Great that you were able to talk with the coach and they seem open to working with her if/when she seems ready to move up/skip.
Is she showing signs of disinterest? And boredom? I am asking because you did not mention this in you initial post. If she is still excited about her practices, wanting to go each time, then I would be reluctant to pay for privates at this point. In general, I am not a fan of privates to work on uptraining when the coaches should already be accommodating this in practice. If this is not happening, it my be time to look for a different type of gym instead of handing over more money to them.