What am I not alerted when a message comes into my watch
Why am I not alerted when a message comes into my watch
Apple Watch Series 5, watchOS 6
Question marked as
Messages work the same way as notifications. They go to either your Apple Watch or iPhone, but not both. See the "Manage notifications" section in:
Notifications on your Apple Watch - Apple Support
If your iPhone is unlocked, you'll get notifications on your iPhone, instead of your Apple Watch. If your iPhone is locked or asleep, you'll get notifications on your Apple Watch, unless your Apple Watch is locked with your passcode.