My comment here isnt directly related to op but another body control skill besides temp that I can do that I never hear about that I learned when I was bored in class too was to control my hair standing up.

I can also control my hunger/thirst with visualization.

I can control my minds action-reward loop.

I'm kind of just cracked on mind/body control in general lol

I dont have the link anymore but I read something about how our bodies have vagal neurons that allow us to sense inflammation and modulate immune activity as a result so I think we can even manually control immune response.