Fenix 5X - No HIIT App?

I apologize if I'm grossly overlooking something. There's a few preset AMRAP workouts I'm trying to get transferred to my Fenix 5X, but they're built as HIIT activity type and I cannot for the life of me seem to find that app on my watch. Nor even if I try to add a new app. So when I attempt to transfer the workout to the device, Garmin Connect tells me I have no compatible devices.

I'm only assuming the 5X does not have such an app, therefore no compatibility? Worst case, I'll probably build the workout  as close as I can manually myself and do it as a "Cardio" activity type.  I think Cardio workouts only can do circuits and not rounds like HIIT, but that might be my only option if the 5X really cannot handle HIIT workout types.

Or I upgrade to a 6X... Joy