Wake up Watch automatically with an incoming Notification - Galaxy Watch 4
You can customize your watch to wake up automatically when a notification arrives on your watch.
- Open Wearable app on your phone.
- Go to Watch Settings > Notifications > Advanced Notification Settings.
- Enable Turn on Screen here.
Once this is ON, your watch automatically wakes up when a notification is delivered on your watch.
Source : myhealthyapple.com