Apple Music Family Sharing
Do I have to login with my appleId on my family members device to share music?
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It is my understanding that all family members get access to Apple Music with one Family subscription, but you don't actually share music. Everyone gets their own music library. However, you can share playlists:
Create and share Apple Music playlists - Apple Support
You can, however, share music you have PURCHASED (with or without an Apple Music subscription) :
What types of content can I share with my family using purchase sharing? - Apple Support