Certain signs do not work after signing out of media and purchases
Some songs weren’t showing lyrics when I played them (they were the day before) so I signed out in the Media and Purchases section of settings and signed back in. When I went back to Apple Music, a bunch of songs said “This song is not allowed in your country or region” and the titles were grayed out.
When searching for the songs or looking on the artist page, the songs were still able to be played.
One thing I noticed was it was only songs from one particular artist and only the ones I had downloaded to my phone previously
iPhone 11 Pro Max, iOS 18