@Zaka77 It might help to check out things like PSA: User FAQ - Support & Answers
For Brave, especially on mobile device like you’re using, you need to make sure that you have Notifications enabled for Brave. If it can’t serve notifications, then you get no ads.
Other thing is making sure you check things like the language/region you selected for your device and make sure it matches where you live. For example, let’s pretend you’re in India and you’re using English-US for your language/region. Then it wouldn’t pay you for ads because your device is saying you’re in the United States but your IP address shows in India. So in that situation, you’d have to make sure it shows English-IN.
Also important is information you did not answer, like which version of Brave you’re using. If not updated, you’ll stop getting ads. You also didn’t answer if your device was able to pass SafetNet, which you would have to install and test. If it doesn’t pass, then you get nothing.