The flag for Sint Maarten, which may show as the letters SX on some platforms. This is the Dutch half of the of the Caribbean island of Saint Martin. Not to be confused with St. Martin, the French half of the same island.
The Flag: Sint Maarten emoji is a flag sequence combining 🇸 Regional Indicator Symbol Letter S and 🇽 Regional Indicator Symbol Letter X.
These display as a single emoji on supported platforms.