That process can be more complicated than it seems. I tried to publish my open-source game on F-Droid, but the build process involves building native component

That process can be more complicated than it seems. I tried to publish my open-source game on F-Droid, but the build process involves building native components with a specific third-party version of the NDK toolchain, as well as shell scripts to move files around, so it never made it to the store.