if the error you are encountering is region not supported it means you are not supported no one can relink if they are in a unsupported region sad life for us
You can find the list of currently supported countries for connecting to Brave Rewards with Uphold, here: https://support.brave.com/hc/en-us/articles/6539887971469 If your country is not on that list, then unfortunately you won’t be able to connect Rewards with Uphold at this specific time. However, we are constantly adding more countries.