yes there is. there's a muscle that does exactly that, supination, and it's called supinator.
https://en.wikipedia.org/wiki/Supinator_muscle
you don't supinate muscle, the muscle supinator supinates the forearm.
we can make a separate thread about it if you want.
Etymology
The term "supinator" can also refer more generally to a muscle that causes supination of a part of the body. In older texts, the term "supinator longus" was used to refer to the brachioradialis, and "supinator brevis" was used to describe the muscle now known as the supinator.
I was right and partially wrong. You can supinate your foot and the muscles there are not called supinator muscles. But you are correct, there is indeed a muscle called supinator.
Supination – the arch rises and the foot becomes slightly shorter. In a supinated position the foot is rigid and able to act as an efficient lever for walking. The main muscle that causes supination is tibialis posterior and the main muscles that resist supination are the peroneal muscles.
supinator - a muscle that can act to cause a supination movement, e.g. to turn the palm of a hand superiorly or anteriorly is called an supinator.supinate (verb) - For example, the supinator muscle in the lower-arm supinates the hand and wrist.
You were right and partially wrong.
So go ahead and make your thread. It's a draw.