Wow, there’s a lot of firmware-level resources listed in the “Infosec_Reference”. It has been around for a while, but I missed it until a recent UEFI update. Second URL has a different rendering beyond first URL’s Github.com Markdown rendering.

https://github.com/rmusser01/Infosec_Reference/blob/master/Draft/BIOS%20UEFI%20Attacks%20Defenses.md

https://rmusser.net/docs/BIOS%20UEFI%20Attacks%20Defenses.html