Summary

As per the design in Jira cloud, it is not possible to see the Epic details in the subtask issue view. This feature is tracked under the suggestion ticket:  JSWCLOUD-8181 - Getting issue details... STATUS

This article provides information on how to use Automation for Jira in order to display the Epic details in a Multiline text field that can be displayed in the issue view

Environment

Jira cloud - Automation for Jira

Solution

• Create a Multi-line text field and add it to the Edit/View screens for subtask issue type
  
  

• Create an Automation for Jira rule as follows:
  a) Trigger: When a subtask is created
  b) Condition (Optional): You may add any conditions here if required (Example: Project = TEST)
  c) Action: Edit issue - Edit the "Multiline text field" to include the following smart value in order to populate the field with the Epic details associated with the parent of the subtask:

  {{issue.parent.epic.url}} || {{issue.parent.epic.Epic Name}}

  Snippet: