I've had the Watch 6 since Sept and it has never auto detected workouts.  I have it turned on in the settings to auto detect several different exercises and it has never activated.  On the app, it says auto detect is turned on for the watch so I'm pretty sure everything is on that's supposed to be on.  I used to have the Active 2 and it always worked after using the elliptical for 3 minutes, never for the Watch 6 even after 10-20-30 minutes or more.  What else can I do to make it work?