When viewing a thread on the top left is the back button, and on the bottom left is the Settings button. I propose a swap of these.
When using the app on a phone, it's much easier to move my thumb to the bottom left then it is to go to the top left. The Back button is used way more frequently than the Settings button, so it'd be more convenient to have it reachable.
iOS 18.4.1 on iPhone 15 Pro
Awful 7.9 (70901)