Looks like you need to be careful with the definition of pronation and supination for feet. There's a lot of results for running where they use the term dynamically, and it looks to be different from the original technical meaning.

You can look at images here (be careful to only look at images where it is obvious whether it is a left foot or a right foot, otherwise you'll be doubly confused): https://duckduckgo.com/?q=pronating+feet&ia=images&iax=image...

For hands you can see the twisting more clearly: https://duckduckgo.com/?q=pronating+hands&ia=images&iax=imag...

For feet, the word pronating seems to also mean (perhaps colloquially) rolling the foot inwards at the ankle. Not clear at all: although some of the images show twisting the shin or not (toe in vs duck feet).