Enterprise Components catalogs can be shared with specific projects.
To access the Enterprise Component Center click on the Enterprise Settings icon at the top right corner of Bentley Infrastructure Cloud
From the Components Center tile you can access Manage permissions to manage who can Create, Add, Modify, Approve and Publish Components Catalogs
And the Component Center Catalogs to Manage all the Catalogs and Components
Once a Catalog is shared with a project, the components will show under the Component's tab in the Documents section