We have configured the Initiative issue type in JIRA so that we can link Epics together across different projects. In Portfolio, we are able to add child Epics to Initiatives, and in JIRA, I can go to an Initiative issue and see a list of all the "Child issues" for that Initiative.
However, I can't find a way to add child Epics to an Initiative in JIRA (without going into Portfolio). In fact, I can't find the configuration for this issue link type at all in our admin. Is there a way to expose this issue link so that users can edit the Initiative/Child Epic link in JIRA?