Wix Studio - Rich Content Viewer

In Wix Studio:-
I want to create a custom blog and custom content and have created a collection using a RichContent field (which is formatted text etc).

I have the data via code in the custom window that I have created associated with the collection. I add a CMS → RchContentViewer onto the page.

In Wix Studio
Here is the problem - there is no $w(“#RichContentViewer”).content “content” property in associated with that element.

Wix Editor
When i look at the same process in Wix Editor the RichContentViewer has a “content” property associated with it and it will populate from the collection.

How do i achieve this using Wix Studio?

Product:
Wix Studio

Please advise…

Thanks