Which nation would not be considered a constitutional monarchy today?

Portugal functions as a republic, which means it does not operate under a constitutional monarchy. In a constitutional monarchy, the government is headed by a monarch whose powers are restricted by a constitution or laws, and the nation typically has a parliamentary system. In contrast, Portugal has a president as its head of state and does not have a monarchy currently.

Great Britain, Sweden, and Australia are all examples of constitutional monarchies where a monarch serves as the ceremonial head of state within a parliamentary system, and their powers are limited by a constitution or parliamentary laws. This arrangement allows for a separation between the ceremonial role of the monarch and the governance of the country, with elected officials making policy decisions.