Some languages don’t have the Narration settings, so you can’t turn Narrator on or off.
The Accessibility menu has three submenus: Visibility, Subtitles and Narration. However, some languages don’t include the Narration submenu.
English, everything is working as expected:
Turkish, French and German; the Narration settings are missing:
There may be other languages that are also missing the Narration settings.