Schedule a meeting or an appointment in Outlook for Mac. Display the Time zone menu for the event. On the Organizer Meeting tab, click Time Zones. Add attachments to the meeting. On the Meeting menu, click Attachments Add. Make the meeting a recurring event. Hi Heather Romios. Good day to you. From your description, you first need to verify that the version of your Outlook for mac is 16.24.414.0 and later. Furthermore, we'd like to know what your coexistence mode is in the Teams admin center, like islands, Skype for Business only, etc.
Look under Preferences > General, make sure 'Hide On My Computer folders' is unchecked.
Then go back to the Calendar view. On the left hand side now (under 3 month view) is a Calendar checkbox. Check it again and your calendar should reappear.
If this doesn't work here are some other possible things to try.
Typically issues with calendaring are caused by client issues.