Cannot turn on apple music sync library on brand new iphone and macbook air

I go into settings on my iphone 16 pro max to enable sync library and it highlights for a few seconds before popping up a message saying "Enable sync library to listen everywhere. To use your apple music subcription on this device enable sync library" then the sync library button is automatically deselected. I've tried restarting my iphone, deleting and re-installing the apple music app and signing out and back into to my apple ID and apple store accounts, also my iphone is updated to the latest IOS 18 but still this error keeps occurring. It is also occurring on my brand new macbook air. This is really annoying as I was able to sync offline music to my icloud apple music in the past that was stored on my old mac.