Can Suppliers maintain their catalogs on Supplier Portal by themselves

In Oracle Fusion Procurement, is there a supported capability for suppliers to self-maintain their own catalogs in the Supplier Portal (supplier-managed catalogs), similar to punchout?

Specifically, can a supplier set up and manage their catalog content directly in the portal so that buyers/requesters can browse/select items from the Requisitioning page and create a requisition from that catalog—without the supplier hosting an external punchout site? If yes, what features/configuration are required (e.g., catalog import/management options, supplier authoring, approvals/governance, and supported formats/integrations like OCI/cXML)?