I'm not sure there is any. The nature of copyright makes it so it's impossible to stream music without paying a lot of money to the three or five megacorporations that own all the music in the world.
The only FOSS way to do it will be by sailing the high seas
Invidious might serve depending on your needs.
Jazz flute.
Skin flute
Not really any FOSS but maybe FBNL. Free but not legal...
Whats FBNL? Google results seem inconclusive
If you're talking about streaming your own music, you could set up Jellyfin and then do all of the work to safely put it behind a reverse proxy and access it remotely.
It's a lot of work though, and you don't get new music. Still, that's about as good as you're going to get if you want a legal FOSS option (others have posted illegal options if you're looking for that.)
Navidrome is also a nice self-hosted option for music streaming. I recently cancelled my Spotify subscription in favor of hosting my own music library on it.
On Android, I like Spotube. You can sign into Spotify if you want, and the app will interact with it, but uses YouTube as the source for streaming the audio. This is good if, say, you have a free Spotify account and aren't at your PC to use the web player + uBlock.
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