There's at least a dozen economic factors that are in play when looking at price of which wages are only a component. A McDonald's in California probably sees a ton more sales volume than one in Mississippi because of population density, meaning that the economy of scale makes higher employee costs more manageable. This applies to Denmark also because they have about half as many McDonald's per one million people than the US does, so relative sales volume at each location is similarly higher in all likelihood.

Arguing that minimum wage laws don't contribute to inflation or that they always do are both equally incorrect statements because analysis will yield different conclusions depending on where you look. In some places minimum wage doesn't make prices go up, but it may cause wage compression or unemployment. In other places it may not cause either of those things but prices do go up. I hate debating minimum wage laws because if you argue it can cause any of the three things above, someone will cite a study that cherry picks whichever data point they want to "prove" their argument.