Step 3. Adding new networks and tokens to your wallet

After installing and creating the wallet you will have access to this page:

Click em Ethereum Mainnet

Add Network

Here you can add support for other blockchains

To add the polygon network, just fill in the following information

Network Name: Polygon

New RPC URL: https://polygon-rpc.com

Chain ID: 137

Currency Symbol: MATIC

Block Explorer URL: https://polygonscan.com/