You can create an Uphold account. Uphold is a crypto exchange and it is independent from Brave. With your account you can buy, sell, trade and stake crypto there.
However, receiving Brave rewards via Uphold is a distinct matter and it is restricted to certain regions.
If you region is not supported at the moment, you cannot get your rewards. Brave is working to bring more regions back. Your only option is to wait until your region is supported.