iTunes-
songs I had bought in iTunes are disappeared. What should I do?
Question marked as
Apple recommended
If you've deleted them see if you can redownload them : Redownload apps, music, movies, TV shows, and books from the App Store, iTunes Store, and Apple Books - Apple Support
If they don't all show there check to see if you've hidden them from there : Hide and unhide music, movies, TV shows, audiobooks, and books - Apple Support
You won't be able to redownload songs that are no longer in the store, or if you've moved countries since buying them - those you will have to copy back from your backup of your downloads/computer/