I think I FINALLY FIXED IT!!!
If you notice the grayed out songs or darkened songs in dark mode on your iPhone's iTunes app,
- Then, connect your iPhone to your computer
- Go To iTunes on your computer
- Go To your iPhone within iTunes browsing to it under "Devices", drilling down to "Music"
- If you notice ALL of the songs that are grayed out in the iPhone's iTunes app just may have a "dotted circle" next to each one
Note, the song is there, you can view it's properties, it confirms the song is indeed on your iPhone
Note, the song is indeed on your computer as well, within iTunes, you can browse the hard drive and find the song functioning fine
There are 4 ways listed at this link what to do to fix the issue, however, within 30 minutes I found another way. For now, it is fixed. The link is here: https://techgearz.com/fix-dotted-circle-itunes/
I did try solutions 2,3, and 4 in the past, all failed. I refuse right now to do solution 1. That is to find EVERY song manually, delete it off your drive's folder, and drag'n drop back in or import back into iTunes library then resync. That solution requires to go to the properties of every file, locate it, then delete, re-add, resync.
My fix, I hope not a temporary work-around, is easy and fast.
- Within iTunes on your computer, drill down to Devices, select your iPhone, and go to the song or Play List, find the song,
- Right-click the song and select Add to Device, then select your iPhone.
Not only did the dotted circle go away on that song, but it went away on all my songs that were similar.
I hope this brings and end to this problem which occurs weekly, definitely every month.