Community/collection administrators may withdraw items and may make items private as long as the items belong to communities/collections they may administrate. But unfortunately they may not search for private/withdrawn items which results in an always empty list of withdrawn/empty items. When they edit an item/community/collection, the admin-navbar will be shown to community/collection administrators as well, but it contains many functions they are not allowed to use.
We fixed those issues by creating a navbar dedicated to community/collection admins, adding method to test if a person is a c/c admin and by enhancing the solr search query for c/c admins. A PR is in preparation.