It’s certainly an intriguing and complex topic.
My gut reaction is to say that human health is so well-understood already through biology, chemistry, medicine, psychology, etc. that it’s hard to imagine anything technology-related contributing very much to that, and the best we can do is try to identify the hidden harms of tech usage so people can avoid them.
On the other hand, society has given so little attention to this topic, maybe it’s worth exploring. Just look at it from one aspect: ergonomics. Ergonomics is sort of like what you’re describing - finding a healthy pattern - but from a physical, skeleto-muscular angle. Sadly it seems completely lost with these new devices. I mean you look up “ergonomics for ipads” and you find stuff like people laying down with the iPad.
I think that this kind of research is worth doing, but you would really have to be willing to start from first principles and consider that there might not be ANY healthy use case for some devices/apps, or that the optimally healthy implementation of a certain idea has not been found yet. You can’t do it from the angle of “how do we work with the devices/apps we have,” or “how do we let the tech companies keep making money without hurting people,” because that’s a form of damage control and already done by the companies themselves.