Why is my Apple Music library not syncing on iPhone?

i have had a problem for quite some time now, my apple

music library isn’t syncing, i had been logged out and i logged back in to find that my library wouldn’t sync, i do it in my settings and it just says with a pop up “enable sync library to listen everywhere, only my phone is affected and nothing else, would greatly appreciate help as everything else works fine, i just want my library synced again. i am on the latest version of ios18 on an iphone 15 plus, i have tried to restart my phone, i signed out and signed back into apple music, i’ve tried pretty much anything i could yet no help, more attempts to help me resolve this would be greatly appreciated, thanks in advance, Daniel.