Cryptocurrencies and tokens are identified by a ticker symbol like MATIC (Polygon), AVAX (Avalanche), and KSM (Kusama).
How do developers reserve these ticker symbols before or during their ICO so that websites like Coinmarketcap and Coingecko, as well as DEX's like Uniswap, can widely recognize and list them, especially for ERC-20 tokens? Is it site-specific, or is there an official crypto ticker registry somewhere?