Building and installing Armbian on the AIO-3588Q board

[psh]

Hello everyone
I wanted to build Armbian on the AIO-3588Q board.
But I did not see that there was a configuration of this board. There was a configuration of the ITX-3588j board and other manufacturers on the same rk3588 platform and tried to build Armbian.
In the assembled images in GPT format, only rootfs was stored (it combines rootfs and kernel (boot.img) according to the rockchip documentation).
After I built it, I installed it in the rootds partition, it was installed without any errors. But the system does not start.
You turn on the power, the fan starts spinning very fast, spins for 5 seconds, the lower LED lights up, and then the fan stops, the light goes out, a second passes and the fan starts spinning again.
I tried to get logs through the debug port, nothing was output except Chinese characters mixed with question marks (binary data)

I tried to create a custom board profile for building Armbian, but I constantly got errors during the build. Dragged all dts and makefile from source firefly.
Also could not understand what is needed to modify uboot so that uboot can run from gpt kernel located in rootfs.

Please tell me how to:
1) Get logs from uboot and connect to its command line?
2) How can I build Armbian for AIO-3588Q together with Uboot? Or build Uboot separately, but what is needed for correct parsing of GPT from rootfs? Maybe someone had experience of building for this board