I currently run two d&d games, one for a group of teens. There are currently 3 of them (of 5), one is in a situation where he cannot afford a PHB, so he uses 5e.tools, and that is all he uses his phone for. Another does not have a PHB, but has meticulously copied all of their abilities from my PHB, ABs never touches their phone. The third has a PHB, but also has ADHD, and is always on their phone.
My adult group no one uses a device.
I keep an iPad at the table to look up images when I forget to print the graphic, or if it is not too visible in black and white.
I have considered a basket for phones for the teen group, but only one is an issue and even without her phone she drifts from paying attention. I also have adhd so I empathize with her.
I do not know much about lazysocial but Blahaj seems like a great fit for your community. I am a male, so I never comment on the posts in the community, but I think it is a great place.