UPDATE:
I still don’t know how it happened, but I realized that I could toggle the invisibility bit.
One weird thing happened on my MacBook Pro, and I just recently noticed it. I am not really what really caused it, but there are some theories about it.
My Home folder seems to be “invisible” under the Finder. I can see it through the terminal, and through the side bar.
I’m combing through the usual places for clues and solutions.