This is the flag of Swiss Confederation. It is square with a red bottom and a white cross in the center. It is displayed as CH on some platforms. It generally means Switzerland or the territory of Switzerland, and its capital is Berne.
🇨🇭 is the Emoji of a country/region‘s flag, and its meaning is flag: Switzerland. The Emoji 🇨🇭 is composed of two regional indicator letters, namely 🇨 and 🇭. The country/region's 2-letter code for Switzerland is CH, so the letters corresponding to the two region indicator letters are C and H. 🇨🇭 is displayed as a whole flag on most platforms and as a two-letter symbol on a few platforms.