How do I add physics to a bone

So I want to add physics to a tail bone for my fox so that it reacts to the movement of the fox running. How would I do that?

You will need to enable sub stepping if you need multiple bones for the tail but otherwise you only need to go to the Physics Asset and in the body mode set the bone to “Default”, “Kinematic”, or “Simulated”

Kinematic would be to follow the animation
and Simulated would follow physics

Let me know if this helps at all.

location of Substepping in picture below