\\\\\\\\\\ editing bios values without modding bios:

0) warning: the hex values change per different bios versions - do not update your bios and assume they are the same. go get the new hex values for what you want to change.

0) info: the changes will persist until you clear cmos/restore optimal defaults

1) get bios rom
2) decide string you want to edit
3) UEFITool -> Open bios .rom -> Ctrl F, Text, search for string you want to edit
4) double click one of the results, right click the section (probably PE32 image section) that it takes you to, "Extract as is", save
5) IFRExtractor -> Open the saved file from UEFITool, click extract
6) Text editor -> Ctrl F for similar name to the string you originally wanted to edit
7) Take note of the hex after VarOffset/VarName as well as it's options in the following lines, choose what you want to change it to
8) Take the USB stick with modded grub shell and boot to it in UEFI mode
9) Setup_var or Setup_var_3 0xHEX 0xVALUE

\\\\\\\\\\ links:

https://github.com/LongSoft/UEFITool/releases
https://github.com/LongSoft/Universal-IFR-Extractor/releases
https://github.com/datasone/grub-mod-setup_var/releases
http://ftp.gnu.org/gnu/grub/grub-2.02-for-windows.zip

\\\\\\\\\\ grub stuff:

1) format usb stick as empty FAT32 - you can use rufus
2) take the folder from grub for windows .zip and go to its directory in command prompt
3) assuming drive D is your usb, change according to whatever drive it is:
grub-install.exe --boot-directory=D:\ --efi-directory=D: --removable --target=x86_64-efi

4) replace the file on your usb stick in EFI/boot with the modded grub efi file

requires uefi boot

additional helpful links:

https://www.win-raid.com/t3908f16-GUIDE-Grub-Fix-Intel-FPT-Error-or-BIOS-Lock-Asus-Other-Mod-BIOS-Flash.html
https://github.com/acidanthera/AppleSupportPkg#verifymsre2