I’ve managed to remove the Flag and Share buttons from the bottom of topics on desktop, but in the iOS app there’s still a “Topic Controls” dropdown containing Flag and Share. I did the CSS in the “Common” section.
Is this a bug?
(The topic footer buttons are especially cluttered on mobile screens, so having an unnecessary big “Topic Controls” button is a bit annoying, especially as I don’t think there’s a way to remove “Bookmark” either which is another big button. If these were just icons, it wouldn’t be so bad, but currently nearly half the screen at the end of the topic is buttons.)
Mobile can be a little tricky to check if you don’t have a development environment set up, but if you add ?mobile_view=1 to the end of your forum’s URL this allows you to view mobile on a desktop, which can make it easier to work with.