Could be the child is on the autistic spectrum, I’ve seen that in my own family.
The last thing a child on the spectrum needs is a tiny computer to keep their brain in overdrive. You basically train them to be addicted to it just to keep them quiet and to avoid socialization. There is a reason so many kids are “on the spectrum” now. My generation had to learn to exist in society so we could not indulge it.
I was diagnosed in 2005.