I dont view this as a problem. Pitching in softball is just not as easy as finding the kid who can throw hard and putting them on the mound. Everyone has to learn to throw underhand.
Lucky for your DD you're on this site. Big advantage. I think @NJSwampdragons could maybe have some good input here.
The thing is it takes good coaching and alot of practice. If there are no good coaches in your area then it's on you. Luckily it's all open source on here in the IR in the classroom sticky. If you have to teach her yourself, my advice is learn a little yourself initially(this is a hillhouse protip). Get like 1 or 2 steps ahead of her. Then start working. Throw underhand the right way. Get the arm working the right way and she will have some good success eventually. Try to stay 1 step ahead for as long as you can.
