This is the flag of Bouvet Island. The red flag has a blue cross with a white crochet on the bottom. It is displayed as BV on some platforms. It generally means Bouvet Island or within Bouvet Island.It is a outside territory of Norway.
🇧🇻 is the Emoji of a country/region‘s flag, and its meaning is flag: Bouvet Island. The Emoji 🇧🇻 is composed of two regional indicator letters, namely 🇧 and 🇻. The country/region's 2-letter code for Bouvet Island is BV, so the letters corresponding to the two region indicator letters are B and V. 🇧🇻 is displayed as a whole flag on most platforms and as a two-letter symbol on a few platforms.