it seams still a problem in 2023 to install Endian Fw on a EFI only system.
I can enter grub, but after select the boot entry, there is no output.
It seams that the efi framebuffer driver is not compiled in.
The system boots in background - when it is up i get a beep all secounds.
It also reacts on sysrq reboot request (CTRL+ALT+PRINT and REISUB)
I also tested some kernel params, like nomodeset and video=vesa / video=efifb:list ... but all without success.
to bad, I would give it a try... but without console it seams not be possible for me.