how much storage can each family member use
family member is only getting 5gb, is there a way to give them more
storage
iPhone 8 Plus
Have you set up Family Sharing iCloud Sharing? If you have, have you invited them to join and has they accepted? Have they tried signing out of iCloud and back in to see if that will refresh the storage?
Family Sharing – share iCloud Storage
Family Sharing - Share an iCloud storage plan with your family