This page contains information about data residency for the Metadata for Confluence Cloud app. The Metadata for Confluence Cloud app currently stores 2 kinds of data:
The storage of the actual application data. This includes the configuration (for example, the defined Content Categories and their Metadata fields) and the actual Metadata values. This data is stored entirely in the core application, that is, in your Confluence Cloud instance. So, this data is stored where your Confluence Cloud instance is hosted.