In the index.js’s file you imports the chains,
For default is mainnet, and y can change it to goerli, but if i import polygonMumbai dont find the chain.
The chain is import from @wagmi, if you go there, you can see a list of chains,
declare const arbitrum: Chain;
declare const arbitrumGoerli: Chain;
declare const avalanche: Chain;
declare const avalancheFuji: Chain;
declare const bsc: Chain;
declare const bscTestnet: Chain;
declare const canto: Chain;
declare const crossbell: Chain;
declare const evmos: Chain;
declare const evmosTestnet: Chain;
declare const fantom: Chain;
declare const fantomTestnet: Chain;
declare const filecoin: Chain;
declare const filecoinHyperspace: Chain;
declare const foundry: Chain;
declare const iotex: Chain;
declare const iotexTestnet: Chain;
declare const goerli: Chain;
declare const gnosis: Chain;
declare const gnosisChiado: Chain;
declare const hardhat: Chain;
declare const localhost: Chain;
declare const mainnet: Chain;
declare const metis: Chain;
declare const metisGoerli: Chain;
declare const optimism: Chain;
declare const optimismGoerli: Chain;
declare const polygon: Chain;
declare const polygonMumbai: Chain;
declare const sepolia: Chain;
declare const taraxa: Chain;
declare const taraxaTestnet: Chain;
declare const zkSync: Chain;
declare const zkSyncTestnet: Chain;
¿How i can cange the chain to polygonMumbai?