I am currently trying to get a CM5 to work on a CM4 development board, so I used the firmware image for RPi CM4-compatible Debian 12 and flashed it on a Windows machine and first, it comes preset in Chinese with usernames and passwords and locks on the full package list, but it also comes with no UEFI. /boot is empty (except for a grub folder that doesn’t actually get called when booting) so I can’t clean up the image. I needed a headless version based on Debian Lite, but just cleaning up the GUI packages makes it so it freezes on the splash and never goes anywhere.
Basic question is where is the UEFI?! There’s no bootloader on that image!