Can't sync to iTunes

Music has a feature where playlists modified on a device should be able to sync back to the library, updating the original list on the computer. Duplicate copies may arise when this syncing process goes wrong. Earlier I was suggesting that it was the device that you wiped and reloaded, which you will likely still need to do, but you can either clean up the duplicate playlists manually, or try reverting to an older version of the Music Library.musiclibrary database. With Music closed browse to your Music library folder, ~/Music/Music, then enter Time Machine and restore the database to a recent date before the duplicates were created. See Restore items backed up with Time Machine on Mac - Apple Support. Note that duplicate playlists don't imply there are multiple copies of the songs, multiple lists can reference the same tracks.

Once you are happy that the library is the way that you want it once more you can try reestablishing the sync relationship with your iPhone. The most efficient way to do this is to remove the Music app from the device, which will also remove all data associated with it, then reinstall the Music app from the App Store, then see Sync your iPhone, iPad, or iPod using your computer - Apple Support to set up syncing from scratch.

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iTunes & Finder can on occasion get confused about what content is already on the device, and determine that too much content is selected for syncing. This may resolve if you reduce your sync selections such that a sync can complete, then reselect the content that was previously on the device. Check that you're not inadvertently syncing all video content. How big is your library? The numbers given suggest Finder thinks there is a total 94.44 GB to sync. Could that be realistic?

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See this post on erratic syncing. It may be time for the nuclear option, blow it all away and start over.

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