Hey @Gaten thanks for reaching out to the Spotify Community,
Spotify would love to have all the world’s music available to everyone. However, some artists and tracks aren't currently available.
I'd recommend reading this article for more info.
On some occasions Spotify’s internal review process on ‘offensive content’ constantly seeks to remove illegal/offensive content which could have happened here.
Spotify has some info about this here.
Best,
Jack 🙂