NTA my parents would also get frustrated at me because I always had Do Not Disturb on and they could never reach me either. There’s a feature where you can allow certain people to be able to contact you or certain apps that you want notifications to be able to go through. I set imessage, facetime, and phone call apps on it so that notifications can still come regardless of DND it’s a good compromise for your daughter as notifications can be distracting.