Xiaomi 4a R4ACV2 new version / bricked

Hi there! Thanks for your work! I confirm that this compilation does not brick the divice, which is an achivement for me already (since I have bricked it a couple of times already and had to debrick it with CH341a progammer)!!! However I really need firmware based on v21.02.7 feed. Please advice how should I aproach this task using your patch? and/or your github source?

I appologise in advance for dumb questions, as I am relativery new to OpenWRT. I am trying to learn how firmware builder works based on standard devices so far...