Parent-Child hierarchy feature for campaigns

Please build this!
We need more in-depth features when it comes to campaigns. For instance, if our event is called, “Event 2021” - we’d like subcampaigns that we can can track within in it… like “Launch” and “Post Event” for communications like social, tasks, and email.
This will make it easier to see how many communications are marked as part of the launch and how many are part of the post-event.