Most of My Apple Music Playlists are missing, and I have no idea why. Ideas, anyone?

I noticed today that most of my Apple Music playlists are missing. Not all of them, just most of them. Nothing has changed about my subscription - I have Apple One. I just opened the app on my iPhone 16 Pro, which I've owned for nearly a year, and the playlists are gone. I'd really like them back. Ideas?