Please check this very popular news site echo.msk.ru. Brave for iOS indicates 30-50(!) blocked ads and trackers. Still the site remains stuffed with ads, mosty from Yandex. Should shield manually be turned off and on then they are applied correctly for some time. However, once the page has been reloaded or user turns to another page ads are popping up all over the place again. FYI, desktop Brave perfectly blocks all ads on this site.
Nice case for testing. Hope you’ll find a solution.
Thanks and best regards,