The answer is this previous forum post could benefit from a more descriptive manner for deleting schematic pages beneath the root page as it makes assumptions.
https://forum.kicad.info/t/deleting-hierarchical-sheets/40597
To say just hover the mouse over the sheet symbol and press [Del] works, if and only if the user is viewing the Root(page 1) of the schematic AND zoomed way out so that the other page(s) outline “symbols” also appear on screen.
I appreciate @paulvdh’s good faith effort in providing an answer, but many of us KiCAD users are quite new to this wonderful and amazing open-source ECAD app.
Another problem I encountered and could not find a reliable (or current) answer for is that after adding a 2nd schematic page, it just appeared as “untitled” and there was no place that I could find to give it a name.