1. Jira sub-tasks issue types are not supported in the Requirement or Issue module.
2. Epics can be imported in QMetry as Requirements or Issues. The Epic fields - Epic Link, Epic Status, Epic Color and Epic Name are supported and are available in the Jira details section of an Epic imported as a Requirement or Issue. Issues that are part of these Epics can be viewed in the "Issues in Epic" tab.
To view the issues of the Epic under the "Issues in Epic" tab, their issue types must also be integrated with the Jira project and synced in QMetry. These issues show the "Epic Link" (Epic Key) to trace back to its Epic. Read about Epic Traceability.
Map multiple Jira projects from multiple Jira instance with one QMetry project