Have they been using AI art? All of their art that I’ve noticed has been from David Revoy.
And it’s a fairly small open source project that only started working on the phone app last year. It’s not that surprising they haven’t gotten apps for every platform yet.
I feel like less common or more specific hashtags tend to work better. If you try to follow common words like art or music or dogs, it can overwhelm your feed and a lot of it is mediocre. If you browse those tags, you might see more specific tags used along side them focusing on what you actually want.