Lightburn uses DXF layer colors on import to define separate layers, not the layer definitions themselves. Fusion360 does not define different colors in dxf outputs. This is a pain when working with folded sheet metal drawings with a flat pattern output that contains bend lines.
This script uses ezdxf to grab each defined layer and assign it a different color.
It will also nicely draw it for you at the end to let you validate.
git clone <thisrepo>python -m venv .venvpip install -r requirements.txtpython prep.py path/to/my.dxf