I'd like to create a JQL filter to show all the issues and subtasks in an epic. There was already a discussion on it that's been marked as solved ( -Software-questions/JQL-to-show-all-issues-AND-subtasks-in-the-Epic/qaq-p/346433), but none of the answers provided solve the problem - they can show the issues in an epic, but none of them show subtasks as well (note that I only tried the JQL and didn't try any of the third part tools recommended).