Adjusting alert preferences for messages, mentions, and activity within Microsoft Teams
The same for me: not all notifications are showing, i only recieved one from a one-on-one Chat, but in the notification settings all notifications are set to show.
Especially annoying are the missing notifiaction when a scheduled ist started by a participant (one of my most used feature for the notifications).
Luckily i could revert bach to the normal "classic" teams through the settings menu - the notifications work just fine again!