When you are an Approver, you must select how you want to be informed when employees create registrations.
Via web application:
Click: Approve & register -> Notifications
Check the boxes for the registration types you want to receive notifications for.
Click Save.
Via mobile-app:
Click Approve in the top right corner of the home screen.
Click the bell/alarm icon in the top right corner.
Check the boxes for the registration types you want to receive notifications for.
Click Save.