Standard iOS devices cannot run IPA files directly. You must use a sideloading tool to "sign" the app:

The Apple Music IPA is a file that contains the Apple Music app, which is a streaming music service developed by Apple Inc. The app allows users to stream millions of songs, playlists, and radio stations.

The search for an version is understandable. Subscriptions add up, and the desire for unlimited, premium music streaming without recurring costs is human nature. However, the technical architecture of Apple Music makes local cracking impossible.