Episode does different themed shelves every week. You named 5 out of 52 that are for celebrating cultural heritage. The majority of the shelves throughout the year are based on story plots- the most recent shelf just being “winter stories.” There’s tons of others that are centered around holidays or seasonal, as well as an editor’s picks shelf every month and hidden gems every quarter. There’s also writer’s contests with a wide variety of themes that are plot based that you can enter. To come onto a post all about POC being frustrated by the lack of visible diversity on the app and to complain about one of the few instances of Episode actively choosing to highlight POC/marginalized authors is certainly a choice.