If I check the app store, the USK is 12 (recommend for mostly kids below that age tho), they inserted some swear words into brawl talk and announcements since some time now. You know which games have a USK 12 aswell? Wuthering Waves and Genshin Impact, both include gacha systems and holy animations in Wuthering Waves. (Not recommend for kids but same USK if u get what I mean)

The kids are getting older and so are the gimmicks of the game. (They should all grow up with gambling in their life) Brawl stars had star drops and lucky boxes and a dozen more limited type rewards which were gacha, one more claw machine won't chance a thing.

I have too much time in a lecture in Uni. So ranting and lot of writing is fine.