Google introduced Digital Wellbeing in order to allow users to track and manage their phone use, which extends to a per-app basis. This feature is now integrated into a new Chrome browser update. It can be used to display screen time and how much of it is spent on each website visited.
https://www.notebookcheck.net/Digital-Wellbeing-is-now-a-feature-of-Chrome-on-Android-10.439903.0.html