Hi @mpous ! Thanks for the reply.
Yes, I read the instructions and I believe this repo (GitHub - balena-os/balena-jetson-orin: Balena integration repository for Jetson Orin devices) did most of the job for the basic bsp for Jetson Orin AGX. But I am trying to modify this a bit like replacing a dtb, a kernel image, and some dtsi files.
I believe we can try something like this: Support Connect-tech Rogue AGX Carrier board for Jetson Xavier - #7 by codewithcheese, and I am thinking to add dtb file inside balena-jetson-orin/layers/meta-balena-jetson/recipes-kernel/linux (please correct me if I am wrong), but not sure about where I can replace dtsi files. So it would be really helpful if I you could direct me where to look at!