This is the flag of the Kingdom of Tonga, with a red background and a small white rectangle in the upper left corner with a red cross in it. Red symbolizes the blood shed by Christ, and the cross represents Christianity
✝️ . TO is displayed on some platforms. It generally means the Kingdom of Tonga, Tonga, or within Tonga. Its capital is Nuku'alofa.
🇹🇴 is the Emoji of a country/region‘s flag, and its meaning is flag: Tonga. The Emoji 🇹🇴 is composed of two regional indicator letters, namely 🇹 and 🇴. The country/region's 2-letter code for Tonga is TO, so the letters corresponding to the two region indicator letters are T and O. 🇹🇴 is displayed as a whole flag on most platforms and as a two-letter symbol on a few platforms.