Epic Roll-Up Report displays the progress of all the epics across projects. The summarised view shows the epic details such as Issue Type, Issue Key, Status, Summary and progress metrics % of Issues Complete, % of Time Complete, Original Estimate, Remaining Estimate, and actual Time Spent. To expand and collapse the report view, click >. The expanded view displays the report for all epics at the story level with details.

...

The Epic Roll-Up report Report can further be tailored and detailed as required by selecting the fields from the Configuration fields.

...

Embedded Epic Roll-Up Summary

The Roll-Up Reports for Jira app adds a new field Epic Roll-Up Summary on the issue details page. To view embedded Epic Roll-Up Summary, follow the below steps.

...