1. Check if your notifications are set to appear on your desktop – You can use your operating system's menu to check if the notification box is checked and then open Teams on your desktop.
2. Ensure that your Do Not Disturb mode is not turned on – You can go to your Profile in Teams and turn it off, or click the bell icon on the bottom left of the app and toggle it off.
3. Check your notification sounds – Make sure that you have musicians turned on, or you can choose a custom sound for Teams.
4. Update your Teams App – If you haven't updated your Teams app, try the latest version, as updates often include new features and bug fixes.