I dont beleive you can do that. I’m pretty sure that VexCode VR Robot only gives you one robot design to practice and experiment with code. There is a site that does this but you can’t build with inventor and the site is pretty difficult to figure out at first. robotmesh.com/studio. If you find out you can make your own robots for vex code vr let me know that would be really neat to do.
There are no plans/instructions for the VEX VR robot. I doubt that your students would be able to replicate it as some parts are unique to that robot and aren’t competition legal (such as the down eye, pen, etc.)