CoinGecko listing:
https://support.coingecko.com/hc/en-us/articles/7291312302617-How-to-list-new-cryptocurrencies-on-CoinGecko
GeckoTerminal update token info:
GeckoTerminal note on CoinGecko-listed tokens:
https://support.coingecko.com/hc/en-us/articles/22612245806745-How-do-I-update-token-information-on-GeckoTerminal
DEX Screener token listing:
