How to sync playlists from old phone to new laptop?
Syncing back audio tracks from an iPhone to a computer was never part of any iOS version. In the past there have been tools like senuTi but afaik they don't work anymore.
If you have an Apple Music subscription on the phone you can log into Apple Music also from the Music application on macOS. It may take a while but all tracks and playlists from the phone will sync back to your Mac.