I do not know, my HK1box-LAN100m.dtb has been included in the new armbian builds.
If there is no my dtb, then you can use meson-sm1-tx3-bz.dtb or meson-sm1-x96-air.dtb
So that the multiloader finds u-boot on emmc, you may have to flash the stock android firmware to a later one
Or use this option: rename u-boot-tx3-bz.bin to u-boot.ext (But when you turn on the TV Box, there will be a colored grid, then an orange background and only then a normal black background and loading)
The problem is that there is no u-boot.bin for our TV box, which would allow you to boot normally from an SD card. It's best to fix u-boot-tx3-bz.bin
I found a solution for myself, built the kernel on 5.15.89 and used the old rootfs armbian desktop
And armbian desktop it works load with my SD card, as well as wi-fi and bluetooth, everything suits me, so I stopped working on creating u-boot.bin
Pipomaru Gmail reacted to Energokom in HK1 box LAN 100 (s905x3) latest releases with kernel 6.1 does not start from SD card