Which roles/privileges are needed for Responsive Self Service Procurement to view smart form?

Summary: What privileges are needed for Responsive Self Service Procurement to view and create requisition from smart form?

We are currently testing responsive self service in the lower environment. There is a requirement to create request types that should be displayed on the front page from the smart form using the VBS. After publishing the VBS in the lower environment, we can't see the smart form except we assign Procurement Catalog Administration and grant the add the user as procurement Agent. We have a custom role already created which will like to add a privilege to. What privilege can we add to our custom role without adding user as procurement Catalog Administrator?