EDIT, 16 Aug, 2022: The release of this functionality has been delayed. It will be released in the second half of 2022 or in early 2023.
In Jira expressions, you can now request the parent field for issues from company-managed projects. Previously, in Jira expressions, this functionality was only supported for subtasks from company-managed projects and issues from team-managed projects.
This change will be rolled out in August 2022 and will affect base-level issues (e.g. story, task) from company managed-projects. Additionally, in late 2022 or 2023, the parent field will start returning parents of epics in Jira expressions.
Note that the scope of this is Jira expressions only. We’ve already applied a similar change to the Jira REST API.
Please see the changelog for more details.