itunes
Can I transfer an existing subscription to a new Apple ID?
iPhone 11 Pro Max, iOS 14
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No, purchases made with an ID are permanently associated with that ID. Some items can be shared. Look into using Family Sharing to continue to be able to use items purchased with one Apple ID with other Apple IDs.
Family Sharing - https://support.apple.com/HT201060
Set up Family Sharing - https://support.apple.com/HT201088
Also of possible interest:
How to make a playlist in the Apple Music app --> https://support.apple.com/HT207542
"If you have a profile on Apple Music, you can make a playlist public so anyone can find it when they search Apple Music. When you create a new playlist, turn on Show on My Profile and in Search."
How to share music to Facebook, Instagram, or Snapchat on your iPhone, iPad, or Android device --> https://support.apple.com/HT211799