How to add events to a Teams calendar without sending out a mass invite to all users

We needed the same thing and what works for us is the following:
1. Create a sharepoint page and add the group calendar to that page.
2, Create a new tab in the channel that links to the sharepoint page you just created.
Instructions for those 2 steps are here: https://www.youtube.com/watch?v=i543O6vMNt4&t=1s

Then users need to use Outlook to add events to the group calendar. Everyone will see the events, they'll appear on the sharepoint page, but no one receives any meeting invites or notifications at all.