Apple Music
I did Apple Music Family subscription so I shared a family member which he accepted the invitation so when he went to Apple Music it’s still showing a request for him to Choose a plan
Question marked as
If all the steps in:
Get an Apple Music family subscription - Apple Support
Set up Family Sharing - Apple Support
were followed, then he might be able to fix his issue by turning Sync Library off for all of his devices, then turning it back on again. Learn how.