CQ and AA? What? well CallQueues and AutoAttendant. Lots of new changes there.
On Friday I started to look into this. And there are some major changes:
First it has been moved from the legacy portal to Teams portal (huge step).
It now looks like this:
When that is done you can just follow this guide: https://docs.microsoft.com/en-us/microsoftteams/manage-resource-accounts
Now you can start to build your CQ and AA.