The answer is dependent on what region your Confluence instance is running. For instance, if the Confluence instance is data residency pinned to a specific region that we don’t support, it will always default to the “global” region, which is the US for Scroll Word Exporter.
However, Confluence also has the concept of running an instance in a specific region without being data residency pinned to it (you can’t choose this region). If this is the case for your instance, when you install the app, Confluence will choose the closest supported region ie. EU, US or DE
For more technical insights into these scenarios please see Atlassian’s own developer documentation: https://developer.atlassian.com/cloud/jira/platform/data-residency/