Access Space Sense API for leg tracking?

Recently, Supernatural (https://www.getsupernatural.com/) added 'knee tracking' based on estimating head and hand movement (i.e. not knee tracking at all). Since they only needed crude tracking, this was sufficient for them.

Would it be possible to access the Space Sense API to get similarly crude (though slightly better) tracking? I just want to know if the user's leg is extended out in front of them or not. I don't need exact position or anything. I'm happy to assume the object is their leg if it's within a certain (small) radius.