The songs that are grayed out were burned on to my Mac with an external CD burner. Then added to Music and then synced to iPhone. Music 1.3.6.14 Ventura 13.6.9 iOS 17.6.1 It happens randomly to different Playlists after syncing the iPhone to the Mac. I no longer use Sync Library / iCloud which was causing other sync issues.
4 Ways to Fix ‘This Song Is Not Available in Your Region’ in Apple Music on iPhone
Does Apple Music display an error that reads This song is not currently available in your country or region? Here's a guide to fix the error!