How to modify the List Page Columns of Custom Object Extension in Visual Builder

Summary:

We have custom object in Fusion Sales and we used the Extension Generator to generate and export the .zip file to import into Visual Builder.

Once imported into Visual builder, all the components appear to work as expected, e.g. the first page is the list page, where you can either create a new record, or you can select an record which would take you to the detail page, etc.

Using the rule sets, we can modify the layout for the panels, create and edit pages, but the list page doesn't work.

How do we modify the columns shown in the list page for the custom object?