help syncing music

I am a Windows user and historically used iTunes to rip CD's and manage my library. Months ago I switched from iTunes to the trifecta Apple Devices, Apple Music, and Apple TV. The issue I am encountering is that music that I rip it iTunes and then import into Apple Music are not syncing with my iPhone 14 Pro Max running iOS 18.1.

As part of my diagnostics I removed all music from my iPhone and tried to sync my whole music library. Here is the step-by-step process and error:

1. I opened iTunes and ripped the new Linkin Park "From Zero" CD.
2. iTunes put the ripped CD in the "C:\Users\<user>\Music\iTunes\iTunes Media\Audiobooks\Linkin Park\" folder.
3. I closed iTunes and copied the "Linkin Park" folder to C:\temp\. I then deleted the "C:\Users\<user>\Music\iTunes\iTunes Media\Audiobooks\Linkin Park\" folder.
4. I opened Apple Music and imported the "C:\temp\Linkin Park" folder, which correctly put the files in the "C:\Users\<user>\Music\iTunes\iTunes Media\Music\Linkin Park\From Zero" folder. Apple Music is able to play the new music just fine.
5. I closed Apple Music, opened Apple Devices, connected my iPhone, and synced. The process goes through steps 1 - 4, showing the tracks transferring during step 4.
6. Most of my library syncs except for "From Zero." I get a popup window stating "Some items, including “Good Things Go”, were not copied to the iPhone “iPhone” because they could not be found."

I have confirmed Apple Music is using the "C:\Users\<user>\Music\iTunes\" media folder location. Anyone know I can get new music to sync properly?

P.S. Going back to iTunes is not an option. Once I switched to Apple Devices, Apple Music, and Apple TV, I have been unable to use iTunes to manage my library. Even if I delete all the apps, including iTunes, and then just install iTunes, it only shows Podcasts and Stations - it no longer shows my library. I have tried this many, many times...