Edge 130 Plus and 3.2.x

I'm new to this so I may be missing something obviuos.

In the API docs for WorkOutStep, the Edge 130 + is listed as a supported device. 

https://developer.garmin.com/connect-iq/api-docs/Toybox/Activity/WorkoutStep.html

If I set the Min SDK version to 3.2.x in the manifest.xml, I cannot select the Edge 130 + as a build target.

How can I use the WorkOutStep API?

Paul.