The This article explains how to create an AIO report showing issues with their epic links. Basically, the feature to use the Epic link doesn't apply to Team Managed project projects due to the restrictions from Atlassian, but the parent issue key works as a replacement for the epic link, so, by using the field Parent “Parent Issue key Key,” in AIO reports, the epic links can be displayed for the linked issues.
Instructions
Navigate to AIO Reports → Custom Report → New Report
Add the fields Issue key, Issue type, and Parent Issue key to the report.
Run the report to get the list of issues and their Epic links
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