OpenWrt support for TP-Link HC220-G1

I searched and did not find support for TP-LINK HC220 -G1
So I built via menuconfig
I built with a TP-Link Deco M5 because the specs are pretty similar
The build process also supports this device
When I upload it to the TP-LINK HC220 -G1 device, it does not work at all - and does not boot
I'm a beginner and I don't know how to modify boot files
Please Help
Full device specifications:

Do you already have serial port access ?

Yes, I have
Is there anything i can do with it

create an initramfs for the Deco, boot it running from RAM (so no flashing) via the boot loader
explore the device from within the initramfs.

@krstan10 any progress with that?