Brave has made official announcements on it. I’ve also discussed things like this in places like my own Topic over at PSA: Unsupported Region
Try reading that site again.
Brave Ads — Supported Countries (Active Campaigns)
That would be that you can view ads and earn BAT. This is where you see your country listed. But then scroll all the way to the very bottom of that list
You’d click on that link and see Germany isn’t there.
Also, you should know Uphold stopped allowing new accounts in Germany long ago. Brave had been keeping people with prior accounts connected. But then support rescinded the same time Brave limited support to most of the world.