Hello,
I suggest a change of the SDK documentation where installing ROS2 on the VOXL2 is described. Currently, they point to this repo, which seems to no longer provide the solution - at least, it did not for me on an out-of-the-box Starling. What did work was:
sudo apt install voxl-ros2-foxy
but I had to scrounge around the forums to find that - I'm not sure why it isn't in the base documentation. I think it'd be helpful for new users to see that first.