You can add custom networks by navigating to
and clicking on the "Add" button. You can enter the network details manually or
search through a list of networks sourced from chainlist.org.
This list is updated on a daily basis and served through user data files of
Troubleshooting note: Normally, a browser restart is enough to ensure that
you're using the latest networks list, if not already the case. Alternatively,
you can force-check for new updates by going to
clicking on "Check for update" under "Brave Wallet data files".
You can also add custom chains through sites like chainlist.org. Examples of the UX for adding custom chains through external websites can be found below: