A gray heavy equals sign, a mathematical symbol which is used to indicate equality. This is a new emoji belongs to Emoji 14.0 which released in September 2021.
🟰 generally means mathematical notation, math or equality. It can be placed between two expressions (words or emojis) to indicate that the content on both sides of the equal sign has the same value or meaning. Besides, equal sign can also be used in chemical formulas
⚗ or symbolizing LGBT rights
🏳️🌈. Related emojis:
🧮➕➖✖➗