Currently F-droid has no MAL-like client, thus releasing it there would gain this app a lot of users (and thus more supporters). Since it's already open source, it fits the criteria of the app store.
Unfortunately being just open source is one of the steps they require to release the app. It's pretty troublesome process.
You can always download the apk from mirrors.
Currently F-droid has no MAL-like client, thus releasing it there would gain this app a lot of users (and thus more supporters). Since it's already open source, it fits the criteria of the app store.