There is a new UEFI library available, a few days old.

“Most structures and function prototypes defined, from UEFI spec 2.6”

https://github.com/JeppeSRC/EFILib

I’m guessing, but I expect EFilib is going to be used in a new UEFI C/asm bootloader called SuperPotato, by the same author. But for now, SuperPotato is still vaporware.

https://github.com/JeppeSRC/SuperPotato