Which fields are supported for Extended Display? (And can we please have PacePro and workout fields?)

Having managed to get hold of a Varia Vision, I now want to use it with my Fenix 7S during training and races.

For training, I want to use it to help me pace my workouts correctly.  However, it seems like the workout fields (step pace; target pace; step distance remaining; step time) do not work, they show up as "---".

For races, I want to use it to help me stay on track with my PacePro plans.  However, it seems like the PacePro fields (actual pace; target pace; distance remaining; overall ahead/behind) do not work, they also show up as "---".

I'm aware of the limitation that Extended Display will only show what's on the watch screens and there's no more advanced configuration.

Does anyone have the full list of supported fields so I can see if there are other fields that might help me?  Currently the only thing I know of that vaguely helps me is lap pace.

Also, does anyone know if newer models such as the Fenix 8 support the workout and PacePro fields in Extended Display?

I saw that some Extended Display fields were added in the notes for release 8.13, so I guess support for this feature is being tracked.  Could you please fill in the remaining details?