[Closed] Audio Pro C10 / Apple Music - not all downloaded songs available??

I’ve had an audio pro C10 for a while and just been using it with Apple Music via blue tooth with no issues. Think they are great speakers do bought another for multi room play over wifi streaming / link multiple speakers. Have to use the audio pro app to do this but when I do it only shows me a fraction of the music I have down loaded to on my phone in the ‘my music’ section of the app - c 2,700 songs when there’s c 11,000 downloaded on the phone. Any idea why? It’s showing some downloaded by an artist, but not others and can’t work it out??