Display watch sensor data on phone without installing an app on watch?
How create an app that displays all the sensor data from watch?
Display watch sensor data on phone without installing an app on watch?
How create an app that displays all the sensor data from watch?
No it is not possible at the moment. The data collected such as heart rate is only available on the watch, so you must run an app there, collect and send to your mobile app.
See the samples for how to write an app for Wear OS. https://github.com/android/health-samples/tree/main/health-services
And documentation https://developer.android.com/training/wearables/health-services