Yes and no. Your restrictions will hide the page from an admin as though they were any other user. They won't return search results, "don't have permission to see this" messages, and so-on.
But admins always have the ability to see that restricted pages are there in a space and change those restrictions.
Hi Community! I’m Elaine, Confluence Product Manager. You may have read my earlier post about page tree in space navigation sidebar. I'm excited to share another improvement that helps you organize ...
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