Deleting subscription albums from the library after switching from Apple Music to iTunes Match

I subscribed to iTunes Match and cancelled my Apple Music subscription. A few years ago, I paused my Apple Music subscription and was surprised to see that all my music that I had not downloaded on the laptop disappeared. To avoid this, I decided to subscribe to iTunes Match before cancelling Apple Music in the hope that I could keep the several hundred albums I had uploaded, including most of my CDs.

My Apple Music subscription has now ended and all my uploads are still in the library, which is what I wanted. But in addition to my uploads, there are also the several thousand albums I had added from the Apple Music library. All the tracks are greyed-out. How do I get rid of all the subscription-only items I cannot listen to without going through all the albums one by one?

(I cannot remember which ones I own and which ones were added from the Apple Music. I habitually added things I bought on, say, Bandcamp that were already on Apple Music instead of uploading the files.)