Local vs custom firmware build - param differences

Hi all. I could use some help in debuging my local environment:

What additional steps do I need to take to replicate the same firmware and response from https://custom.ardupilot.org/ ?

I’ve tried using the extra_hwdef.dat file but I still don’t get the same response, even if the build log looks the same. I’ve also tried loading the parameters from the successful custom firmware to the local one, but to no response.

This is part of a bigger issue referenced here: