No sound on watch series 6

Hello 8930t,

Welcome to Apple Support Communities. We understand that you don't get a sound when you receive text notifications on your Apple Watch, and we'd be happy to look into this with you.

Just to clarify, do you receive the text notifications on your Apple Watch but there is no sound, or you don't receive notifications at all? Also, are you experiencing this behavior with a specific app or multiple?

"Notifications go to either your Apple Watch or iPhone, but not both."

Notifications on your Apple Watch

Also, check out the information in the following link:

Change the audio and notification settings on your Apple Watch

We hope this information is useful. Kind regards.