Now you make the UI available as SAP Fiori Launchpad application by assigning it to a Business Catalog which corresponds to a group in Launchpad.
From the Business Object’s overview go to Custom Catalog Extension application by clicking the Maintain Catalogs action.

A new window will open.
Start adding a catalog with the Add action.

In the opening value help narrow down the result list by searching for Extensibility
, select the Catalog with role ID SAP_CORE_BC_EXT
and press OK.

Select the just added Catalog and Publish it.

This step takes some minutes, the screen refreshes automatically and once the status switches from unpublished to published, you can close this application’s window and proceed.