I'm more worried about her back. Using your back to jump is just awful technique. If you look at skaters like Jason, Nathan, Mariah, Liza, Loena, Gabby, Kaetlyn, etc. who have maintained big jumps well into adulthood one of the biggest themes is they have great posture into the jump.
Good jump technique involves using the leg strength and force from knee bend (see Keegan, Shoma, and Nobunari Oda) to vault up into the air and upper body checking/twisting to create rotation. This creates height and distance to allow for rotation. This is also why Kori Ade's students seem to have such clean technique - good posture, good knee bend, and clean clear checking. It is very bad technique to use the back for force because it can lift you up, but can't create nearly the height or distance legs can. Similarly, the knees are not designed to twist and leading your rotation from the legs isn't as effective. This technique works when you're younger because lifting and rotating a smaller body is easier, but doesn't work when your body is bugger.