Meaning
The flag emoji for the Caribbean Netherlands, the islands of Bonaire, Sint Eustatius and Saba, which are special municipalities of the Netherlands. It represents these three islands together.
It mostly appears in travel and diving posts, since the islands are known for coral reefs and quiet nature, and in messages from Dutch-Caribbean families: “Shore diving every day in Bonaire 🇧🇶 fish everywhere” Each island also has its own local flag, so some people simply pair it with 🇳🇱.