Currently, the Catalog Listings page is very difficult to manage and navigate. There is already a feature request to be able to sort by Visibility which is definitely needed, but this is a related platform improvement request to be able to Search/Filter/Sort the Listings by Catalog and/or SubCatalog from the main Listings page. This could be as simple as adding a drop-down choice to only show specific Catalogs from the current drop-down list (Courses and Programs are now the only options).
This is definitely needed. Sorting through all of the listings is a big challenge now and it would be so much easier if it could be sorted by catalog.