I get the sense that Google isn't completely sincere with its Digital Wellbeing campaign. Rather than tally up your usage statistics on a dashboard, why not confront the addictive technologies (social media apps, clickbait/sensationalist styles of speaking) head on? Surely they have the data on what addicts people on a deeper level.
One example that comes to mind is "Hey, you've used social media X times today. Here are some websites you may like that would increase your attention span."