@medway: Yes, it does. The sleep pattern will have its four states (Awake, REM, Light, Deep) analysed by using your movement and changes in your heart rate. A graph will be provided with recommended ranges for each measured sleep state.
To access the information, wear the Galaxy Watch 3 while you sleep, then open the Samsung Health app when you wake up, swipe upwards or downwards to access the Sleep Tracker, and you can view the breakdown of each sleep pattern from here.
