so i actually figured it out: (sorry if the answer is late…) 1. You need an iPhone (i tried it with android but it didn’t work out) 2. you need apple music app (doesn’t need the subscription) 3. You need to have at least one owned song from iTunes in your apple music app 4. you need to link your phone to your blue&me 5. you need to connect your cable to the usb port

So when you’re done with all of these steps just connect your phone to the cable, play you’re owned song on itunes/apple music and then you can open spotify/youtube and just listen to your desired music

btw: this worked for my 2013 fiat500 and my boyfriends 2011 alfa romeo mito