@James Chan_110 Thanks for posting in our Q&A.
To clarify this issue, could you please tell us how did you configure this policy? If possible, please show us the screen shot of this policy. It is suggested to check if you enable Teams notifications on your Android device.
1.Open the Microsoft Teams app on your Android device.
2.Tap on your profile picture or initials at the top left corner of the screen.
3.Select "Settings" from the dropdown menu.
4.Tap on "Notifications" and then select "Manage notifications."
5.Ensure that notifications are turned on for all the categories you want to receive alerts for, such as messages, mentions, and calls.
Meanwhile, please check your device settings to ensure that notifications are allowed for the Teams app.
1.Open the Settings app on your Android device.
2.Tap on "Apps" or "Applications."
3.Find and select "Teams" from the list of apps.
4.Tap on "Notifications" and make sure that notifications are enabled.
If there is anything update, feel free to let us know.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.