Brave Wallet automatically provides a list of the most popular networks used in Web3. However, if you do not see a desired network available, you can add a custom network from your Web3 settings.
Click on the main menu ( ), choose Settings > Web3. Alternatively, you can enter brave://settings/web3 in your address bar.
Wallet Networks option.
Add in the top-right.
Next, you can search for the network from the list provided or enter the details manually.
Submit once all details have been entered.