Missing CDs
Hi. I have the most updated version of Mac OS Catalina, and I have an iPhone 11 Max Pro. YEARS ago, I uploaded all of my CDs to iTunes on my MacBook Pro. I have a subscription to Apple Music. I have made sure that synching is turned on on both devices. Yet, my CDs either no longer appear or several of the songs are missing. In Music on the MacBook, they appear with the icon of a dotted line cloud. On my iPhone, they appear with a cloud with an ! in the center. What do I need to do to get my CDs back?
MacBook Pro 13", macOS 10.15