On mobile devices when a not-logged-in user opens an article with an pending review in desktop-mode, the tab for the history (in German: Versionsgeschichte) is missing, see screenshot.
Maybe this happens only in languages with longish text in the tabs at the top (Ungesichtete Änderungen = pending changes; Quelltext bearbeiten = edit source(?))
Screenshot is from https://de.wikipedia.org/wiki/Dok2 which today has pending review