Apple One Subscription
I signed up for Apple One and now do not have access to my music or tv. When I open Apple Music it wants me to sign up for a plan. How do I access it through my Apple One subscription?
You should still have access to those services:
Bundle Apple subscriptions with Apple One - Apple Support
See the replies to:
https://discussions.apple.com/thread/252957995
Sometimes when you change subscriptions, you might be able to fix your issue by turning Sync Library off for all of your devices, then turning it back on again. Learn how.