Uphold verified account cannot be verified by Brave rewards

The fact that you have an account with Uphold and KYC is up to date does not mean you are able to get rewards. Your country is currently not supported for rewards.

There are many reasons behind this decision, as you can see in the following post.
There is also a difference between being allowed to trade crypto via Uphold/Gemini and being allowed to receive rewards. These two distinct activities have completely different regulations in most of the countries.