One subscription shared with up to five people, each with their own library. Free Trials: New users or those with eligible new devices can often get 1 to 3 months free officially sideload your own developed apps for testing purposes? Apple Music - Apple (PH)

To play local MP3s, you don’t need a modified IPA – just use the native app or a third-party player like VLC. But that’s not “Apple Music working” – it’s just file playback.

It sounds like you're looking for a review of a modified Apple Music IPA (iOS App Store Package) designed to work on sideloaded devices or specific hardware.