My fix was simple — I found the PHP code in the single-post template. Copied it. Moved it to underneath the headline tag. My problem was solved by finding my own solution after the solutions provided were either FAR BEYOND my abilities or just too confusing to figure out.
Probably not the most ideal solution — but it was a LOT LESS headache on my end. And didn’t need to spend an afternoon creating a child theme or anything like that.