When you create a Facebook Story you can add some music to it.
How can you make your music available in the search music from Facebook story? The source of that music is very unclear for me. According to some sources is from Spotify but for sure I am not able to retrieve music that is already on Spotify.
Is it a release for Facebook also required?
If you want your music to be on Facebook/Instagram, you just need to tick that card when you create your release and your music will be able on those social platforms in the Story.
The source of the music would be iMusician as you would need to upload your track in order to deliver it.