Currently, the only way for the administrators to check restricted pages is to access each spaces and check the Space Settings.
However, in the following situation, this operation requires a lot of work.

• There are many spaces in one site
• There is a possibility that a person who left the site had created restricted pages in several spaces

In this case, admins have to access all the spaces to check for potential restricted pages.

It'll be great if Confluence administrators are able to view all restricted pages and those creators across all the spaces in their site in one screen.