Sober Time
With Premium, you can see your trackers in the Sober Time app on Apple Watch and add them to your watch faces.
Install Sober Time on your watch from the Watch app on your iPhone, or from the App Store on the watch. Open Sober Time on your iPhone once so it can send your trackers to the watch.
If the watch says Sync needed, open Sober Time on your iPhone. If it says Premium Required, check that Premium is active on your iPhone.