Great start to what will likely be a great app. I have a couple easy to implement UI/UX suggestions.
1: The community drop down bar I believe should display the community you’re currently viewing instead of displaying hot/new/most comments etc as you already have an icon displaying that.
2: A toggle in the settings to enable swipe anywhere to go back when swipe gestures is disabled to help with Plus/Pro Max users that have average/small hands lol.
Other than those two minor complaints I’m loving the app, however!
I too have found that I cannot upvote comments; can only upvote (or downvote) posts.