shared iCloud storage privacy?

Nobody can see anything at all from each other’s storage in iCloud. The storage is tied to the Apple ID and iCloud account even though the space is shared. You can’t see anything in your kid’s storage and they can’t see anything in yours.

You can share a photo albums and a calendar, but that takes user input to set up.

See the following from Share an iCloud storage plan with your family - Apple Support

When you share a storage plan, your photos and documents stay private

and everyone keeps using their own accounts with iCloud—just like when

you have your own storage plan. You simply share the space available in

the iCloud storage plan with your family members, so you only have one

plan to manage.