Currently as an approver I will get a notification in the @mentions drawer in the nav bar, but once the notification has been read it disappears.
It would be great to display a numbers badge across the approvals navigation bar, or somewhere else, that makes it more obvious that there are outstanding approvals to be made.
Like, for example, when you have unread emails on an iPhone. You get the red/white badge number. This would also be great to use via the mobile app, too.