I really like the color scheme for the app. So many apps these days just stick to Material You design or basic grey/black/white and looks boring. The blue theming is really nice.
As others have said I also like the text size as it is currently. As an accessibility thing it might be worth including some options but for now, I think it's a very usable size
The sorting and view options being in the FAB are not intuitive. I feel like the "Local | New" text at the top should be menus to switch sort/view options.
I would also like to have some sort of Lists or Categories function where we could have additional feeds with specific communities in them, like having multiple sets of subscribed communities.
Overall I feel like this is a strong start and am looking forward to continued development.