From a functional Orange Pi 5+ Debian Bookworm (vendor) OS I mounted the SD card containing the Armbian Bookworm with 6.12 kernel, I checked the uuid for the mounted mmblk1p1 (I don't have mmcblk0p1)
/dev/mmcblk1p1: LABEL="armbi_root" UUID="baa71ffd-ca4c-4b04-acfa-956e263f56dc"
with /boot/armbianEnv.txt being set to rootdev=UUID=baa71ffd-ca4c-4b04-acfa-956e263f56dc
and /etc/fstab being set to UUID=baa71ffd-ca4c-4b04-acfa-956e263f56dc / ext4 defaults,noatime,commit=120,errors=remount-ro 0 1
A boot to the Armbian Debian Bookworm 6.12 Cinnamon desktop SD Card stops at the initramfs loading stage. I've downloaded the image several times and used balena etcher to write to a variety of sd cards, each failing at the same stage.