Hi there @MusicLover124,
thanks for reaching out to the Spotify Community !
Spotify functions as the receiving end of content and as a "stage" for artists to upload their desired content.
Therefore, the availability of content on the app varies between countries and depends only on permissions from rights holders.
In case you'd like to double check if this content is indeed unavailable for you, I'd recommend asking a friend/sibling using Spotify in the same country to look for it on their account (if it isn't, you can read more about it here).
On the other hand, you can always use the "Local Files" feature to upload your legal content to the app or try reaching out to the band's representors and ask.
Hope this shed some light.
Let me know if you have any further questions 🙂