Hi,
If you would like to enable Weston as default GUI, we suggest develop it from minimal or basic rootfs:
Root File System — NVIDIA Jetson Linux Developer Guide 1 documentation
The environment is clean and without X. Please try in the environment and check what commands are required. And then run the commands in startup. There are some examples in
Jetson AGX Orin FAQ
Q: How to autorun an app or commands at startup?