Ethernet not working when running Armbian on Acemax KII TV box

[Fast_taters]

Hello.
I'm trying to run Armbian on an Acemak KII TV box (Amlogic S812 processor).
From the page
https://armbian.com/boards/aml-s805-mxq
I downloaded the Armbian image
Armbian_community_26.2.0-trunk.792_Aml-s805-mxq_trixie_current_6.12.28_minimal.img
Using Win32DiskImager, I burned the Armbian image to a MicroSD card.
In the armbianEnv.txt file, in the dtb_file line, I specified the path:
dtb_file=/dtb/meson8m2-mxiii-plus.dtb
I inserted the MicroSD card into the TV box. The TV box boots, Ethernet works, but there is no HDMI signal on the monitor.
I tried specifying different dtb file variants in armbianEnv.txt.
I found that if I specify the path
dtb_file=/dtb/ meson8b-mxq.dtb
, HDMI works (the console is displayed), but Ethernet doesn't.
I decompiled the meson8b-mxq.dtb and meson8m2-mxiii-plus.dtb files, but I can't combine the files so that both Ethernet and HDMI work. I've attached the decompiled files.
Please help me prepare a combined .dtb file

meson8m2-mxiii-plus.dts meson8b-mxq.dts

[Fast_taters]

The TV box is equipped with an AP 6330 WiFi module. The Ethernet RTL module is 8911F.