I replied to both users that responded to me because each helped me find a part of things I had missed.
I would also like to add here that if there are no batteries present in the DevTerm, or if, like me your cells are dead, OR if the blade connectors at J1 and J2 are making proper connection, as of the build of Raspberry Pi OS for the DevTerm as of 9-5-2021, the Menu Bar (in windows what I would call a “task bar”) flashes about 5 times and disappears. I have no way to prove this, but I have a feeling it may have something to do with the battery status monitor that is part of the menu bar. It’s just a hunch based on my IT experience. While I was having the bad battery/bad connection issue, I attempted to solve the flashing menu bar by reading lots of Stack Overflow for linux sites, and none of the tricks I tried fixed things. Fortunately fixing my two battery issues did. Anyhow, thanks for viewing, and I will go see if I can somehow mark this thread resolved.