Question on moats

I often see that moats are simply categorized into a few types: network effects, switching costs, regulation/legal protections, economies of scale, and non replicable assets. However, are there moats outside of these commonly used ones? Like for example a company in a duopoly or oligopoly, I guess that is usually thanks to regulations that allow them to do so, but not sure. I feel there’s many times I want to name a moat that doesn’t fall under the common ones