You mean you want the page containing the report macro to show a change when any of the data reported by the macro changes? This is not possible. The report page doesn't contain any of the property content, so there is nothing to show as changing on the page.
You might try finding a way to display the latest modification date for the property pages somewhere on the report page next to your macro.
I'm still not quite sure what you're looking to do. A macro is just a set of parameters and a piece of code that can return dynamic content to the page based on those parameters. The page containing the macro will only get a new revision if you edit it and change the macro parameters.
If you want a summary page that you are never going to edit, then that page's revision date is always going to stay the same—end of story. I'm saying that if you want to tell your users when a change occurred on some other page or set of pages, you could do that with some text and a macro inside the content of that summary page.
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