Iām not sure if the above is your main issue with your school, or sort of the straw that broke the camelās back. But if itās a main concern, I would ask the principal what exactly is going on during the ādevice exposureā time. I know that some of my teaching colleagues have the text online instead of in books. Same books/stories being read, just off a screen instead of on paper

I donāt know if itās cheaper or just looks futuristic or what. But it could be that the same material would be covered even though a device is used.
Ask for more information. Maybe if enough parents question it, theyāll reverse the decision.