Drbeast
As far as I'm aware, OEM Unlocking is "Bootloader" Unlocking.
Basically, the OEM Unlocking toggle w/n Developer Options on my (Verizon-variant) Pixel 6a persists to remain "grayed out" even after applying the most recent System Update + Factory Reset afterwards as specifically noted to do via the GOS Web-based USB Install guide webpage.
Research has shown to be a widespread issue and I have uncovered possibly some workarounds as described in original post, but there hasn't been any definite "Yes, this works for the Verizon-variant Pixel 6a."
I just don't want to waste any further time trying to make it work if it simply just isn't going to.