This is the flag of
🇦🇺Australian Overseas Territory—Christmas Island. The flag is divided into two triangles diagonally from blue and green. There are five white southern crosses on the left and one golden white-tailed tropical bird on the right, in the middle is the outline of a large green Christmas map in a golden circle.It is displayed as CX on some platforms. It generally means Christmas Island or within the territory of Christmas Island.
🇨🇽 is the Emoji of a country/region‘s flag, and its meaning is flag: Christmas Island. The Emoji 🇨🇽 is composed of two regional indicator letters, namely 🇨 and 🇽. The country/region's 2-letter code for Christmas Island is CX, so the letters corresponding to the two region indicator letters are C and X. 🇨🇽 is displayed as a whole flag on most platforms and as a two-letter symbol on a few platforms.