A user reported that the ‘Create a new topic’ button disappeared from the desktop welcome page in their community using the Horizon theme on a Starter plan. chapoi clarified that this is intentional — the button was moved to the top of the sidebar for a cleaner desktop layout, while remaining on mobile for accessibility. The button still exists on desktop, just relocated; newkid confirmed they found it on the right-hand side, admitting they hadn’t noticed it before. The user appreciated the clarification and noted their community hides the left sidebar for a minimalist view, making the original button’s location useful — but now accepts the new placement.
This is expected behaviour: Horizon is an opinionated theme and we removed the create-topic button from its original place (which, depending on your setup can get rather cluttered), to a new prime location at the top of the sidebar: