Apple Music resources are not share between accounts
Some students studying abroad may need to switch between accounts in two countries, but we only purchase Apple Music in one region on one account. If I want to switch to another account in another country, the Apple Music resources will be gone, and when switching back, it takes time to load the cloud music.
I suggest either bringing back the iPod or updating the system. Music cannot be shared between accounts in different regions, and sometimes, it's necessary for us to switch between accounts.
iPhone 15 Pro Max, iOS 18