custom workout plan completion with a manual workout?

I started a custom workout plan and included pilates one day a week. I chose to do a manual pilates workout starting the pilates workout on my watch instead of the suggested workout in the fitness+ app. It did not log my workout as complete in my plan. Seems like it should give credit for completing the plan that day no. My plan was for 30 min and I completed 1 hour. And the workout does show as logged in my history?