This is still being worked upon. I hope to have more details in the next couple months.
Please know the team is actively working on this feature.
We are working on a design with more density in mind. Until this design is solidified we are putting this item back to Under Review.
The team continues to make progress on this. We will share more details as we have them.Louis Hellebusch commented
As a similar, but maybe not exactly the same request, please make all calendars (iCloud, group calendars, etc.) that are visible in Outlook sync to the Calendar view in Teams.