In Aha!, if you have enabled 'Delivery risks', one of the things you can do is manually set a flag on a Feature (or Epic or Requirement). In Jira, you can also 'Flag' issues similarly.
Jira: https://support.atlassian.com/jira-software-cloud/docs/flag-an-issue/
We should be able to sync this information between Aha! and Jira. Whether or not the flag is set is effectively boolean on each side.