I have published my first wear app to Internal test track in Play Store. The app is dependent on mobile application and I used Multi APK to deploy both apk within a release.
I can see the mobile app in Google Play and search for it. On the watch I am unable to find my app in Google Play. The direct link (available from Opt-in URL) works fine and I am able to install my app.
Furthermore, when I install mobile app I do not receive any notification on my watch (see https://developer.android.com/training/wearables/apps/packaging): "On devices running Wear 2.0, when a user installs a phone app that has an associated watch app (either an embedded APK or an APK uploaded via the Play Console), the user gets a watch notification about the available watch app"