Yes they are. The implementation tends to differ from how eastern-developed gacha games work, but they're making billions from virtual slot machines nonetheless.
Yeah, I still indulge in video games, and understand that on the surface CSGO skins feel different than Genshin summons, but from 100 feet up it's all the same crap, imo
I do kinda get what you mean, though. Gacha mechanics feel expected in anything western, while 'loot boxes' are still a 'feature' of some games in the east. Eastern studios have definitely noticed, though, and are running the same playbook.