I don't know anything about Genshin Impact but do have opinions on games in general, used to follow games industry news etc until a few years ago.. Reading that Genshin is a "free-to-play" gatcha game, yeppp, totally agree with T.C., I would not be happy with my kids playing that, if I had kids. I reckon those type of games, regardless of their actual contents (characters, storyline, world building, gameplay mechanics etc) are quite a harmful software drug. That kind of thing has been around forever (eg coin-operated arcade machines going back to the 70s, designed to be very difficult & short-lasting, so as to take as much money as possible because people want to keep playing) but modern "free-to-play" games are of a slightly different character - they're designed to take as much of your TIME as possible, they're never ending time sinks.. Their defenders say how you can fully play and enjoy them without spending any actual money, which is sometimes true, but IMO they do something nasty to people, even outside the lure of spending money on 'em. If you let your kids play something like that, you can of course limit the time they're allowed on it.. but I feel they have an insidious effect of...how to explain? Something like, altering your perception of art, culture, creativity...towards the "you will own nothing, and you will like it" style of meaningless, mass produced, impersonal Products.
Probably many people think ALL videogames are pretty much like that, or energy wasting dopamine circuses.. they might be right! But as someone who has been playing games and also programming my own ones since I was a small child in the 1980s, there's a lot of nuance involved that I can see, and in the world of computer games, when these type of ones started to appear it was like a big shift away from the personal & creative software I loved as a kid, towards something I find cold and sickening..
Ahem, sorry for my little rant there.. obviously it's a bit of a personal issue of mine, maybe not that helpful.. Basically, I don't know if any of the specifics of Genshin Impact are harmful or not, and it could just be some fairly innocent fun, as much as modern games can be.. But I honestly think the whole structure and.....vibe?....of these type of games is subtly harmful to anyone, possibly moreso than more traditional kinds of games. (But having grown up surrounded by them, it's hard for me to say... I often think I'd be a better person if I'd never laid eyes on 'em!)