Unfortunately, there is nothing that can be done at this time.
Linked the specific links in the above post that relates to your case below. Only the countries listed are eligible for Brave-Gemini verifications.
This topic has a lot of posts and links to relevant information that you might want to read.
In the topic was a link to the reddit post below which also provides additional, relevant information.
https://www.reddit.com/r/BATProject/comments/vfya5l/weekly_bat_discussion_thread/
Source: Link reference Region not supported error GEMINI - #61 by Aman_M