Songs Ripped from CD set are Greyed out by iMac Music App

Years ago, I ripped all of my CDs onto my iMac. More than 10 years ago, I got an iTunes match subscription. I replaced that with a subscription to Apple Music about eight years ago. Now, some of those selections are grayed out, and will not download so I can play them. I noticed that this has happened with some Apple Music content that I had never directly purchased. It should not happen with music that I already had on my computer when I began using iTunes match. I've done all the troubleshooting to make sure there's nothing in my settings to create this issue. Does anyone have any suggestions?