Ways to find out uptime of Apple Watch?
Credit to the answer actually should go to one my buddy (thanks again, Max!) who drew my attention to that fact that both iOS and WatchOS actually have diagnostic logs.
So I just run &quot;Watch&quot; app on iPhone and under General/Diagnostic Logs found a file named panic-base-2021-01-18-093103.ips. A self-speaking excerpt from its content follows:
  &quot;panicString&quot; : &quot;Unexpected SoC (system) watchdog reset occurred&quot;