When you subscribe to Apple Music or Apple One Premier, you can use Family Sharing to share Apple Music with up to five other family members. Your family group doesn’t need to do anything—Apple Music is available to them the first time they open the Music app after your subscription begins.
If you join a family group that subscribes to Apple Music or Apple One Premier, and you already subscribe, your subscription isn’t renewed on your next billing date; instead, you use the group’s subscription. If you join a family group that doesn’t subscribe, the group uses your subscription.