Once you have created the Federation, the Federated repositories are automatically displayed in your artifact browser.
Any of the CRUD actions that you perform are automatically applied to the member Federated repositories. Users can perform actions according to their permission sets. The logic is applied according to the last action performed on the artifact by any of the users in the Federation.
The importance of knowing which action occurred last is the reason why clock synchronization is critical to the proper functioning of the Federation (see Setup Prerequisites for Federated Repositories.