Ask for help. Which is the kernel config file.

I tried to build a custom kernel for ubuntu-rockchip. I forked ubuntu-rockchip and linux-rockchip repositories, but I couldn't identify the configuration file used to build the kernel. Is this the correct file: debian.rockchip/config/config.common.ubuntu, or is it another file? My setup is for the jammy orangepi5 desktop. I have already switched the kernel repository source to the correct one.