Update for existing users (users outside the US who were connected and verified with Gemini prior to these region changes):
You can connect and verify your Brave Rewards profile with Gemini again, even if you do not have a US Gemini account.
This includes users who were previously connected and verified with a Gemini account but have pressed “Disconnect from Gemini”, and users in the “Logged out” state.
cc: @Saoiray