OnePlus has released Developer Preview 4 for Android Q, a version of its OS that gives the user the latest insights into how it may work when it has been released for general consumption. This build has been reported to have a working form of Digital Wellbeing, as well as an updated Zen Mode. However, some of its upgrades are only compatible with 1 phone from this OEM so far.
https://www.notebookcheck.net/OnePlus-new-Android-Q-preview-build-introduces-Digital-Wellbeing-and-an-upgraded-camera-app.428741.0.html