I believe its now found
From The Lost Media Wiki
https://www.youtube.com/watch?v=Ytr6qoRHEug at 3:05, it also includes audio for a funeral scene which was never animated.
Edit: https://archive.org/details/g.-i.-joe-the-movie-dukes-death-scene-restored-for-the-first-time heres a re-upload if it gets taken down.