There is an updated pull request by sgn against master on the void-packages repository

https://github.com/sgn/void-packages i686-grub-x86_64-efi
https://github.com/void-linux/void-packages/pull/26895

build grub-x86_64-efi for i686


A patch file from https://github.com/void-linux/void-packages/pull/26895.patch is attached