workout app
I paused a workout on my apple watch and took it off to charge it, when I put my watch back on the workout disappeared, how do I get that workout back?
Apple Watch Series 3, watchOS 8
All of your workouts should show up in your Fitness application. You should make sure to end your workout when you are done with your activity.
Please refer to this article about Apple workouts.
Workout types on Apple Watch - Apple Support