How to fix regional restrictions on my Favorite songs in Apple Music

For no reason I can determine, suddenly random songs in my library are greyed out, and when I try to listen to them, I’m told the song is t currently available in my country or region. If I delete the track/albums and add to library again it’s no different.

these are my favourite songs and been listening to it for ages and now suddenly are not available ????

[Re-Titled by Moderator]