Why can't I set page level permissions on our expensive business accout?

We have a business account with pb V1. One of the most important aspects for us is the ability to set different levels of permissions. But we do not have page level permissions - which is what I need. There are some pages I want to be readable by the publi & some that I do not want to be seen - like medical protocols. I want the clinicians to have access to these pages but not be able to edit them. Right now I must give someone the permission to edit a page if I want them to be able to see hidden & locked pages. When will we be ableto access page level permission settings?
 
sad I’m GRRRR
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