Does she do a backswing? Typically if the backswing doesn’t go straight back where the catcher can see the ball the entire time it’s gonna be off track throughout he pitch. Make sure she doesn’t turn her chest back towards throwing arm side during the backswing
Does she do an out-of-glove pre motion? If so,make sure the ball hand stays in the glove until at least 3 o'clock....maybe even a fraction higher. The glove should guide the ball hand on the correct arm path such that the ball passes over the throwing shoulder. Is she isn't doing an out-of-glove pre-motion....I recommend trying it.