I used to be able to see a list of packages in a table format. It was incredibly useful in situations like How to get table output in `dnf search`? - Fedora Discussion, where the native package manager can’t provide particularly readable output.
However, it appears to have been replaced by a “More information button” (although whether that augmented the aforementioned list before its removal, I don’t know) which displays a wonderfully verbose, but too verbose, list.
It was deliberate. The rationale was that stuffing everything into the expandable part of the list item looked terrible when it was taller than the window height, which was often. And a single mis-click would collapse it again so you would lose your place.
There isn’t a way to revert this change short of changing the code. But note that size information for individual packages was not shown before in the old style either; it’s only shown when not using the “update when rebooting” feature.