Family sharing issue - iCloud storage
I've recently subscribed to iCloud Drive and set up family sharing for my wife and daughter. My wife was already sharing so she got set up no problem. To invite my daughter, I sent her an invitation via SMS. She accepted the invitation and she show's on my MacBook as being a party to my Family Sharing and it says that she has access to iCloud Storage. Except that she doesn't! On her phone Settings / her name it says next to iCloud 5 GB whereas it should say 2 TB - as my and my wife's does. She's tried turning her phone off and restarting but nothing changes.
iPhone 7