laurendc is referring to the global Logs function that existed in version 8.x and prior that let you see an overall view across all managed clients which updates were needed and a total count of each one.
Since moving to version 9 JAMF removed the entire Logs section of the JSS, and this capability among others was a casualty of that change. While you can still see them per machine, that is nowhere near the same as being able to get a birds eye view of available updates. There were other items in the Logs tab that also can't be done now, like seeing a global list of accounts on systems, and some other stuff.
Unfortunately, I don't see any viable way to recreate this functionality if JAMF doesn't bring it back. I suspect the JSS was doing a bunch of table joining or other MySQL manipulations to present those views, which you can't recreate without perhaps doing it from the MySQL command line.
