There are "indie web" alternatives to the big social networks which everyone can use. Social networks without the algorithms that make you doom scrolling, messaging apps that do not track you or read your messages for ads, photo apps that do not have likes and do not gamify karma-whoring, and so on.
To make it even better, these apps are not exclusive to smartphone platforms, so they won't need a smartphone just to participate.
At least here in Germany, even my non-techy friends that are totally addicted to Instagram and Facebook don't publish anything with their kids. I am hoping that by the time their kids have grown a bit, these tools will be more popularized and accessible so that their kids don't fall into the same trap as their parents, and perhaps even the parents take the opportunity to do the switch themselves.