Group Calendar is a priority for the team, and the feature team is continuing work on it. You’ll start to see some incremental improvements. We look forward to sharing more details and timeframes soon.
An error occurred while saving the commentLars Schorling commented
Alternatively there is actually a 3.party solution called OnTime Group Calendar that is 100% based on your organisasion's Exchange/O365 calendars, but integrates directly into MS Teams and MS Teams Mobile.
Should this be of interest to you, here is a link: https://ontimesuite.com/en/ms/product/ms-teams