tokenLists: {
    1INCH: "https://ipfs.io/ipns/tokens.1inch.eth";
    COINGECKO: "https://tokens.coingecko.com/uniswap/all.json";
} = ...

Here you can add the list of tokens you want to use in the app The list follow the standard from: https://tokenlists.org/

Token list must complain with the Schema defined in /src/token.ts