New motherboard - ANX firmware won't flash.

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@Nooblife Hopefully someone more knowledgeable can help you?

Thanks - yep, as a replacement for the original faulty motherboard I would appreciate complete instructions.
I believe there is nothing non-standard that I am doing in this setup/process.
I'm am not even sure whether the firmware is required in my case however I do have multiple issues at the moment:
Sxmo = no charging, no touchscreen, distorted gui interface.
Charging is available on Mobian.

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/sys/class/typec/port0/device/flash_eeprom contains text "Write 1 to this file to initiate firmware flashing. Consult dmesg for results."

After echo 1 > /sys/class/typec/port0/device/flash_eeprom dmesg reports:
anx7688 1-0028: power enabled
anx7688 1-0028: eeprom wr 10 02 00 26 02 19 fb 00 00 00 00 00 02 02 57 90 72
anx7688 1-0028: eeprom wr 20 05 e4 f0 a3 e0 44 02 f0 e0 54 fd f0 12 76 65 02
anx7688 1-0028: timeout waiting for eeprom
anx7688 1-0028: power disabled

echo 1 > /sys/class/typec/port0/device/flash after booting with 'modem killswitch ON' dmesg reports:

IPv6: ADDRCONF(NETDEV_CHANGE): usb0: link becomes ready
anx7688 1-0028: boot firmware load failed (you may need to flash FW to anx7688 first)
anx7688 1-0028: power disabled
anx7688 1-0028: OCM configuration failed
anx7688 1-0028: power enabled
anx7688 1-0028: eeprom wr 10 02 00 26 02 19 fb 00 00 00 00 00 02 02 57 90 72
anx7688 1-0028: eeprom wr 20 05 e4 f0 a3 e0 44 02 f0 e0 54 fd f0 12 76 65 02
anx7688 1-0028: timeout waiting for eeprom
anx7688 1-0028: power disabled