>>277064774
Yup, it's quite possible.
There's the cheap-o half-assed way of using the Kinect or options like it, but that generally requires you to be always facing the camera as well as having some very odd results when you lay down or get low to the ground.
The majority here use what is called a "Hybrid" system, where it has the Rift tracking for the headset and controllers, but then also using lighthouses and Vive trackers for the hips and legs. While it works just fine it's a bit of a headache to setup as well as has its own jank during use since you're trying to slam two different tracking spaces together.

There's also the far-in-the-future option of waiting for Oculus to do their supposed camera-based full body, but who knows when that'll be done. [spoiler]Not too sure why you'd want to do it on the quest personally, but I haven't kept up on the capabilities of it.[/spoiler]