Apple Music Limited since I upgraded to iPhone 16 Pro Max

My Apple Music has limited my music that I previously had no issue with before the upgrade from my 13 pro max. I have no idea as to how to fix this. I erased the 16 pro max and started the transferring data process over again, and that did not help it at all. Music that was readily available suddenly became unavailable on the iPhone 16 pro max, but works fine on my iPad Pro.