Intensity/target type - power range

I own a garmin Fenix 6x and stryd foot pod that I use for running. I used to be able to create a running workout and set the intensity/target type to "Custom power range" and let my stryd foot pod relay that information during my workout. Recently, when I go to create a running workout, that custom power range is not present. I talked to chat support and they said that feature is not supported. 

Wanted to make sure this was the case. I have been using it for 6+ months before it suddenly disappeared. Again, I am not looking for the garmin to measure power (I know that is a newer watch feature), just want to be able to create workouts with it