My opinion is that disconnects are typically about joint values, interests, and expectations. Or, more appropriately, lack thereof. Yes, there's the possibility that the parents don't understand digital devices and therefore are limited in joining the party. But, again my opinion, if it wasn't digital devices, it would be some other thing that was new or foreign to the parents. And so perhaps the real failure is the willingness of the parents to engage at the children's level. It also might represent a lack of shared values and expectations in connecting in the first place.
Your comment seemed dismissive of the possibility of a problem, and of the possibility of that problem being exacerbated by screentime/phone use/tablet use. Ergo my interjection.
As an analogy, that I think is apposite, some people can smoke tobacco and not get addicted, for others it becomes a consuming need; I think electronic interactions can be like this for many people. I get tetchy (irritable) when I don't have a drink for a few days, a similar tetchiness takes me when I don't get my fix of phone time. Screens can provide a very easy way to avoid social interaction, something which is a challenge for me. Stick this all together and you have problems connecting with people that are exacerbated by increased screentime; I do have the agency to avoid getting completely absorbed by devices but I also exercise that agency on behalf of my kids as I believe they have not (as pre-teens) developed the ability for themselves.
It seems to me, you did make that claim.
It's good that all people are exactly the same as you and your kids and that this will therefore work for everyone, isn't it. /s