There was one with ID checks bypassed for AMPERE which was posted in some buried thread here a few months ago, to allow laptop users to crossflash to a higher TDP Bios of the same family.
Based on 5.670.0. I can't find the original thread or discussion however.
nvflash.exe
drive.google.com
Thank you so much for attaching it. Really saved my butt. No idea how I was able to use the official nvflash to flash a VBIOS with the wrong board id, but it wouldn't let me flash back to the factory VBIOS until I used your nvflash.