Final update for anyone who was following this thread.
I had to give up. I tried every trick in the book. Nothing worked.
When all attempts to reset the Bios from Windows failed, I found server sources online explaining how you can reset the Bios from a Linux terminal. Unfortunately, Windows-10 makes installing additional OS's difficult (so does the UEFI Bios), but I eventually found WubiUEFI... a "UEFI compatible" version of "Wubi" (a popular old program that installed other OS and a Boot Menu using Windows that no longer worked on computers with a UEFI Bios).
Long story short, "WubiUEFI" didn't work. On reboot, it reports it "can't find" the linux iso, so there's no OS to install.
But it gets worse. "WubiUEFI" relies on "rEFInd"... a third-party (fourth party?) Boot Loader that doesn't support touch screens (which I did not know at the time). With a missing OS as the first choice and no way to move the cursor right to select/boot Windows, I can't get past that menu. So now I have NO working OS!
So, left with no other choice, I opened the tablet up. Based on
some photos I found online, you
should be able to reset the Bios by shorting a single pin on the Winbond FlashRAM chip, but that too didn't work. I obtained the spec sheet and it mentions a "/Reset" pin, but shorting that didn't work either. I tried shorting the pins before, during and after powering on, but nothing made any difference.
I decided to try again to disconnect the batteries in hopes of clearing the Cmos, this time attempting to turn the tablet On 4-Times in hopes of draining any capacitors or residual charge then letting it sit for an hour before reconnecting the power, but despite all that, the old Bios settings were STILL there.
That made me wonder if it was reading the settings from the built-in SSD, so I disconnected it yet the Bios settings are STILL loading.
So that's it. I can't think of anything else. I will NEVER buy another tablet without a reset button (or w/o a touch-screen bios.) Anyone need an 11.6" lighted serving tray.