Check the assignments display settings:

1. Navigate to the class assignments page
2. Make sure the class is enabled
3. Check the student roles to ensure the roles assigned to students allow students to view and submit assignments
4. Check the assignment settings to make sure they are enabled

If all settings are correct and the class assignments are still not appearing, try the following additional troubleshooting steps:

1. Check the student’s settings to ensure they have not removed the class from view
2. Check if there are any filters applied to the class assignments view
3. Sign out of all Microsoft accounts and sign back in after a few minutes
4. Contact Microsoft Support for assistance