Apple Watch Series 10
No message tone is heard on incoming messages
Solution 2 of 3: Cinema Mode is turned on
With theater mode turned on, the screen on your Apple Watch will not light up when you raise your arm or when you receive messages, calls and notifications. At the same time, your Apple Watch will be set to silent mode.
Press the Side button.
Press the theater mode icon to turn the function on or off.
Press the Digital Crown to return to the home screen.