Only available for Pixel devices until now, the Digital Wellbeing app is finally ready for Android One handsets. The problem is that it only works on Android 9.0 Pie, so only Nokia 7 Plus and Nokia 6.1 Plus users can enjoy this piece of code until additional Android One devices receive the update.
https://www.notebookcheck.net/The-Digital-Wellbeing-app-now-available-for-testing-on-Android-One-handsets.341451.0.html