Unity Catalog provides the capability to discover, audit and govern data assets in one place. This capability does not have to utilize data sharing as it can help you manage your self managed Hive, S3, Azure Data Lake, or Google Cloud storages. If you wanted to perform this management of data across organizations or functions, this is where Delta Sharing would be utilized in conjunction with Unity Catalog, allowing for data to be shared across organizations through Delta and managed/governed through the Unity Catalog.