Currently, per design, the epic-link connects issues from the base level (containing stories, bugs, tasks) to epics, and the parent-link connects epics to issues at higher levels in the Hierarchy configuration.

As an admin user, it would be great to customise the issue linking between parent to epics and epics to the base issues in the Plan view.

For example:

One of the projects users wanted to see the Epics and users stories which are linked "parent task of" or "child task of" to an issues in the roadmaps view.