Unfortunately EmailQueue is locked on the code level. Check CMS\CMSModules\EmailQueue\EmailQueue.aspx.cs file. CMSModules_EmailQueue_EmailQueue class inherits GlobalAdminPage, which means it is available only for global admin.
You'll need to clone if and inverit from another class (e.g. CMSAdministrationPage), create new custom module and use cloned page as a UI Element for it.
Hope this helps.