iPhone not syncing music properly with iTunes on Windows 11.

I built a new computer and moved my large music hard drive into it. I've given it authorization, installed the latest iTunes (iPhone IOS is 18.3), imported music folder and when I look in iTunes at the device, it shows zero music. When I look at the iPhone settings->general->about, it also shows 0 songs. Yet when I open the music app on the iPhone there is music in there and I can play it (also when turning off wifi and in airplane mode), so it's definitely on the iPhone. I can also play all of the music on the computer through iTunes no problem. If I go to the library and select a bunch of artists and then sync, the ones already on the iPhone are duplicates (two of each song listed). Yet when I deselect the artists that are on the iPhone and sync, it goes back to showing none listed (in iTunes) but they are on the iPhone still. This is annoying. I have reset sync history, I deleted through the iPhone storage area. Nothing seems to work. Any ideas?