Hi J. A,
I am an independent advisor, trying to help other users in the Community with my experience in Microsoft products. Please note that I am a user like you and don't work directly for Microsoft.
There are a few options that may resolve the issue.
Check Notification Settings:
Open the Windows Settings menu by pressing Windows + I keys.
Select System from the left sidebar, and then open the Notifications menu.
Scroll down to Microsoft Teams and ensure that both the notification toggle and banner options are enabled. Also, make sure that Teams notifications are allowed in the notification center.
Disable Focus Assist:
Focus Assist is similar to “Do Not Disturb” on Windows. It might be affecting your notifications.
Navigate to Settings > System > Focus assist on your PC.
Uncheck the option that says “Show a notification in action center when Focus assist is turned on automatically.”
Adjust other automatic rules as needed and restart your computer.
Check Your Teams Status:
In Teams, you can set your status to Away, Do not disturb, Busy, Be right back, Appear away, or Appear Offline.
When you set Busy or Do Not Disturb, Teams turns off all notifications for your account. Make sure your status is set to Available in the app.
I would appreciate your feedback.
Kindly note that this is a user-to-user forum, we are users helping other users, we aren't Microsoft employees and neither are we Microsoft agents.
Best regards,
Amadeusz