Hi @bartlomiej_jochym and welcome to the Community!
No, not in the standard plan of Jira Software or without marketplace apps. Out of the box, Jira Software has an issue hierarchy that looks like this:
Epic
-> Standard Issue Types (bug, task, story, ...)
-> Sub-task
You can't create an Epic as a child issue to another Epic. In the premium plan, you can extend the hierarchy above Epics. And then you can indeed create a container for multiple epics as you describe.
Hope this helps!
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