There are packages for iOS app store, but it isn't in any Debian/Ubuntu/Fedora repo? Just snap/flatpak. Am I correct in thinking community maintainers have lit

There are packages for iOS app store, but it isn't in any Debian/Ubuntu/Fedora repo? Just snap/flatpak. Am I correct in thinking community maintainers have little to no visibility therefore? Additionally, is there any indication what source code is used to build an app store submission? Even a checksum?