I went to Mobile View edition of closed projects, like Turkish Wikinews, Interlingue Wikibooks, and Yi Wikipedia. Somehow, the Mobile View editions do not transclude closure notices for those projects. Readers viewing the Mobile View wouldn’t see such notices.
Bulgarian Wikinews displays its own closure notice but uses local code and is located at only its own main page. The WMF’s notice about the closed project wouldn’t appear.
Mobile View editions should display closure notices about local projects.