MacOS - Teams Notifications
Microsoft Teams allows for various notifications settings controlled either by the Teams application itself or through the MacOS. Some prefer the red numbered notification badge that pops up on application icons in the MacOS dock verses the audible "dings", buzzes or banners that may be more intrusive to your daily work. You can switch between Teams vs MacOS notification settings but to allow the dock icon option, you'll need to activate the MacOS notifications for Teams. The MacOS notifications and badge will appear as below:
Go to the 3 dots in the top right of the Teams window
Click Notifications
Under appearance and sound, click the notification style drop down
Click the Mac option
If prompted by MacOS to allow notifications, select Allow