I live in supported region Canada for Uphold account.
But i still get this error for past 2 years on Brave.
Error: Region currently not supported
Your Uphold account can’t be connected to your Brave Rewards profile at this time. Your Uphold account is registered in a country that’s not currently supported for connecting to Brave Rewards.
See the current list of supported regions and learn more about connecting a custodial account to Brave Rewards.