I tracked a treadmill walk with my watch but it isn’t showing up in Fitness app.

I tracked my morning treadmill walk on my watch - Bluetooth connection to the treadmill. The calories I burned and the exercise minutes show up but it doesn’t show that I did a workout in the app. When I finished walking, it showed up as moderate effort. I closed everything out on my watch after the workout like I usually do but there is no workout showing up.