Hello Janicep527,
It sounds like your daughter is having trouble using Apple Music with Apple Music. Are you the organizer of the family sharing group? If so, let’s make sure that Apple Music is enabled in Family Sharing. Tap Settings > Your Name > Family Sharing > Apple Music. You should see “On” next to this option.
If these settings are correct, can you let us know what exactly happens when she attempts to use Apple Music? She may try to sign out of the iTunes Store and then sign back in.
Helpful steps are mentioned here: If you don't see your family's shared content
Have a great day!