Selecting which pages get copied to new subsites

I must be blind because I know it exists, but where is the option to select which pages / posts get cloned when we create a new subsite for a user?

There is a page we don't want users to have access to (let along know that it exists) and it is inside of their dashboards right now.

I can go and delete them manually for the existing ones, but I dont want this copied in the future.

Where can I select that?

Thanks!