Hello,
If you do not want the map on the sidebar then the Supreme theme may not be a good fit for your site.
You can use any theme besides Supreme to have control of the left and right sidebar on the listings page.
Supreme child theme is designed specifically to have the entire right sidebar on the listing page dedicated to a map, with no left sidebar.
The right sidebar map on listing pages is automatically hidden for CPTs that are marked to have no physical location.
However, it is not possible without a customization to include additional items in the widget area outside of that case.
You can use the following CSS and adapt it to meet your needs: https://wpgeodirectory.com/support/topic/removing-map-on-listings-page-in-supreme-theme/#post-409598
For more changes to the right sidebar you will need to hire a developer. You can find GD Experts on this site: https://geodirectoryexperts.com/