Sorry, how did you manage to boot it? I am trying the latest community build Armbian_community_25.2.0-trunk.13_Aml-s9xx-box_bookworm_current_6.6.60_minimal.img and it does not boot at all.
another build, Sunvellt95zplus_Debian_sid_5.12.9_xfce.img boots fine, but it is a little outdated and neither it does not detect emmc.
should I only set my dtb in extlinux.conf, right?