No. JIRA doesn't have that type of heirarchy. All projects are equal.
You could try the Structure add-on if you want something more complex than Category, Project, Issue, Sub-task. But I'd take a look at Portfolio - it doesn't really do what you describe here, but it does offer functionality which helps you work as though it did.
In the past, Portfolio for Jira required a high degree of detail–foresight that was unrealistic for many businesses to have–in order to produce a reliable long-term roadmap. We're tur...
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