How do you restrict some members of your family from certain subscriptions?
Example: I don’t want to share my iCloud with them
We see you'd like to restrict certain aspects of Family Sharing.
You can turn off purchase sharing entirely for your account using the steps here: Stop sharing purchases with your family members on iPhone. However, if you're referring to iCloud+, there is not an option to stop sharing to one specific family member. You can turn off iCloud+ sharing for all family members, but not a single one.
See more details about sharing iCloud+ below:
Alright Thank You
I think @AppleSupport should give an option where you can restrict individuals in your family
If you would like to see that feature added to future versions of iCloud+, Apple does have a feedback page for requesting that sort of thing. You can leave feedback here: