The song exists in the iTunes Store catalog. You can download a high-quality, 256kbps DRM-free version of this track.
The song is not in Apple’s database (e.g., a rare live recording or local band). Apple uploads your actual file to the cloud, so when you download it, you receive the original file you started with. How to Download High-Quality Matched Songs download matched songs
When you enable (via Apple Music) or iTunes Match , your music is scanned and assigned one of two primary statuses: The song exists in the iTunes Store catalog
Upgrading your library to higher-quality files is not automatic; you must manually trigger the download of the "matched" version. Matched, Uploaded, Apple Music, how fun! : r/AppleMusic so when you download it