I'm seeing all my Lists duplicated, and most of them have nothing in them (I probably renamed them at some point, but for some reason the old names are still around, with nothing in them). I created/renamed the Lists in Google Contacts (I think they call them Labels).
I'm using an app called Contacts Sync to sync between my iCloud and Google contacts. I found a feature in the app to delete empty groups. The app worked without issues on my iPhone X. This may be the first time I'm using it on my iPhone 16e. (I also just upgraded the OS on my MacBook Pro to 15.5, but that may have nothing to do with it.) The app has email support; I'll email them.