What constitutes a “move” on the Apple Watch?

Are you moving your Apple Watch arm, or is it stationary, such as you broke your arm and it is in a sling, or you are pushing a cart or baby carriage?

Are you running a walking exercise app at the time?

Then you should be logging move (aka Calories).

I can sit in a chair and swing my arm for a while, and get some move credits. I get the most when in on a 2 mile walk with my Wife, or when I'm doing 7 miles on my bicycle (we have a set route we take).