The following message is displayed when Wear OS users are using the software Nest app on their smartwatches – "Nest is no longer supported by Wear OS".
Reported by 9to5 Google, which received the following comment from Google, it just seems like no one was using the app in the first place.
We took a look at the users of the Nest app on smart watches and found that only a small number of people were using it. In the future, our team will devote more time to providing high quality experiences through mobile applications and voice interactions.
You will always receive notifications on your watch with the Nest app via your mobile device. Wear OS users can control their thermostat with the Google Assistant from any Wear OS device. For more information, click here. If you use an Apple Watch, you will not be able to adjust your thermostat or change the Home / Outside Mode of your watch. However, the actions you could perform on your watch are all available with the Nest app (available for Android and iOS). So you can always control your devices on the move.
We would be angry, but yes, apparently nobody used that.
// 9to5 Google