All of my user profiles (admin and non-admin) no longer show the visual editor toolbar nor will let me switch to the text version when editing a page or a post. Page builder elements and other meta boxes are also no longer visible. This is happening regardless of the user profile.
2nd, there is a user_can_richedit filter hook which may globally switch off a Visual Editor. Check if such filter was not added somehow to your site via plugins of theme files.