ZBT Z8103AX-D: upgrading from 21.02 to 23.05

I found this thread, which could be a good starting point for us: Adding OpenWrt support for ZBT Z8102AX

Running the cat /sys/kernel/debug/gpio command on the z8103ax-d router will display the following:

root@OpenWrt:~# cat /sys/kernel/debug/gpio
gpiochip0: GPIOs 455-511, parent: platform/11d00000.pinctrl, pinctrl_moore:
 gpio-455 (                    |mesh                ) in  hi IRQ
 gpio-456 (                    |reset               ) in  hi IRQ ACTIVE LOW
 gpio-463 (                    |net                 ) out hi ACTIVE LOW
 gpio-478 (                    |blue                ) out lo ACTIVE LOW
 gpio-479 (                    |green               ) out lo ACTIVE LOW
 gpio-480 (                    |red                 ) out hi
 gpio-494 (                    |reset               ) out hi

Here is the OpenWrt 21.02 firmware (.bin file) that I am currently using on the z8103ax-d router. Perhaps someone can extract important information from it.

Here's the DTB files extracted from the firmware above ^ using this tool: