Retrieve my iTunes library
Years ago I downloaded all of my CDs to iTunes. I cannot locate iTunes any longer or my library. Apple Music does not display my library either.
MacBook Pro 15″, macOS 12.7
iTunes is no longer available on the newer MacOS. You must use the Music app instead. (You do not need to subscribe to Apple Music.)
See the 'macOS 10.15 Catalina and later' section in:
Move your iTunes library to a new computer - Apple Community
The library is probably still on you Mac, just in a different location.