tl;dr just put this file in a freshly formatted usb stick and put it in the USB Bios flashback on the motherboard and hold the button https://mega.nz/file/hIxG1J7I#8sCXZIFBsLuxag_x-yIFEMdCOXdPePjhYt1wCBw6JhU
I’m fairly new here and just made this bios using Fernando’s guide as I couldn’t find one on here (thanks Fernando), and if you just want to flash it and have nvme, read the tl;dr, I have personally done this on my machine and it worked.
If you’re interested in further modding, I enclose the .rom (editable) version of the bios, if you want to make more changes. I also include all the software Fernando recommended in their guide. https://mega.nz/folder/cAwhyCyD#iOqFHxuk7cdRlCMhTHd8Qg
Do be sure to rename your final bios according to asus bios conventions though - that’s the name you’ll find on my finished bios.
Thanks for reading