When accessing the site settings on mobile, the section menu is restricted by the size of the search results within the current section.
My step-by-step:
- On mobile, go to ‘all site settings’
- Search for ‘email’ in the site setting search box
- When in the ‘required’ section (with only 2 results) the menu on the left is prevented from scrolling any further down than the ‘files’ section
- Select ‘all’, and now you can scroll the menu all the way down to (in my case) ‘Discourse Gamification’ at the bottom