There’s the PEGI complaints board where appeals or complaints can be lodged by consumers and publishers. Recently Balatro did so successfully, as the 18+ rating for gambling was overturned by PEGI.
Note that PEGI is the games industry regulating itself (to avoid governments from having to do so).






… No, Denuvo is “anti-tamper” software, meaning DRM primarily with anti-cheat as a bonus.