Is kimchi always refrigerated?

Good day, I'm curious about a culinary practice that I've come across recently. The question is, "Is kimchi always refrigerated?" I've heard that kimchi is a traditional Korean dish, and I'm wondering if its preservation method necessarily involves refrigeration. I understand that kimchi is fermented, but does that mean it can safely be stored at room temperature, or does it require refrigeration to maintain its quality and safety? Your insights would be greatly appreciated.