ArcGIS Enterprise includes a locally installed collection of Living Atlas items which you can search and use when authoring web maps and apps. However, some of the recently added COVID-19 content that has been added to ArcGIS Living Atlas of The World will not be discoverable in the currently installed items. The reason is that these have come online recently, and therefore were not part of the Enterprise Living Atlas collection as last updated.
However, all Living Atlas content is discoverable via searching ArcGIS Online when authoring maps using the Enterprise Map Viewer. The key to finding this content is to discover them using an ArcGIS Online layer search.
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