Foot Tracking (or any other real world object tracking for that matter)

Hey folks, 

I've been messing around with a virtual copy of my home climbing wall, so I can climb in the real space but in a virtual environment. One problem I have is that I can track my hands, but not my feet! 

I'm building in Unity. Is there any library or method that would allow me to 'recognise' or track my feet/climbing shoes (even just the tip location, not necessarily orientation) so that i can place a 3d object that follows the tips of my toes? 

Or is this simply not possible on the Quest 2? 

Thanks