Manage and control which notifications to receive and how often you receive them in the Microsoft Teams mobile app.

Manage Teams notifications
1. Tap Menu -- Notifications.

2. Set, modify, or manage these notifications:

Tap General Activity and toggle notifications on or off for Mentions, Meetings, Calls, and more.
Tap Channels to manage which channels you're subscribed to.
Tap During quiet time to mute notifications for specific times and days.
Tap When active on desktop or When in meetings to mute notifications if you're on the Teams desktop app, or if you're in a meeting.

3. Tap Troubleshoot notifications to find more solutions to troubleshoot your notifications.

Support article: https://support.microsoft.com/en-us/office/manage-notifications-on-the-go-de42104f-10e1-4b05-9be7-4b078b8bc94f