I have a great number of CDs that I ripped onto my computer some years ago and they are stored as MP3s as an iTunes library. I uploaded them to iTunes and they now appear in my screen on my Mac and I can play them as normal. I want to be able to listen to them on my iPhone. I am not sure I have enough storage left on the phone so I am attempting to upload them to iCloud to access them that way. However, they don’t show up on my Music app on the phone. What am I doing wrong please?