Currently, Page Approval macro allows you to register and unregister yourself however you won't be able to unregister other approvers (users) unless you have admin access.
It would be very helpful to be able to delete approvers with just a spaceadmin access. Otherwise you always have to consultate the globald system admin to delete approvers. Which is quite impractical. Best case would be the option to choose who is able to remove approvers.
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