I think the Trump card is coming. Why would trump joke about buying Greenland or Canada if they are not owned by Monarchs. Time to pay the bills.

Commonwealth realms. King Charles III is the monarch of fifteen Commonwealth realms (Antigua and Barbuda, Australia, The Bahamas, Belize, Canada, Grenada, Jamaica, New Zealand, Papua New Guinea, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Solomon Islands, Tuvalu, and the United Kingdom). They evolved out of the British Empire into fully independent states within the Commonwealth of Nations that retain the same King as head of state, unlike other Commonwealth countries that are either dependencies, republics or have a different royal house. All fifteen realms are constitutional monarchies and full democracies, where the King (or his representative) legally possesses vast prerogatives, but fulfills a largely ceremonial role.

Other European constitutional monarchies. Andorra, Belgium, Denmark, Luxembourg, the Netherlands, Norway, Spain, and Sweden are fully democratic states in which the monarch has a limited, largely, or entirely ceremonial role.