This is a tricky one because conversion to both these file formats seems pretty involved. Can you link me to some documentation for one of these? (Are these open source?)

Here is the ldraw file spec: https://www.ldraw.org/article/218.html

Lxf is used with lego digital designer. I don't have a link to the documentation, but I know other applications can export to it.

I've had a partially completed version of this drafted, but I've been blocked on this for a while. The backing plates for Lego art aren't available as part of the specs yet, as far as I am aware, so unfortunately the result of the export would be a pretty crappy user experience, which I'd like to avoid. Lmk if there are any reasonable workarounds that don't require users to go out of their way to import the result to an editor.

The backing plate is part 65803, and the Technic hanger piece should be 20953 - would love a bricklink Studio/LDraw export path.