Casinos do not hide their KYC verification it will be utterly silly of them. Before you make a deposit or if you want to know, they have an active customer support chat box that you can use to ask them about KYC verification inside of having an assumption that it is hidden. I blame Gambler for not having the common sense to use the search button to check for KYC verification, or even reading the terms and conditions, or lastly even asking their support agent about KYC.
Silly yes but given how it's a thing that they've done in the past means that they don't care too much that it looks silly or stupid to us that they're doing it. Customer support doesn't really give you big help even if you ask them the right and specific questions, they almost always end up not being able to answer it because they've got a script and that they're likely not finding your questions in their scripts and I don't think they'll like divulge the information that the casino that they're working for have a sneaky KYC policy, at best they might tell you something but the problem is that it's likely a obscure and confusing answers. Blame them all you want but businesses should be honest with what they're doing because once the truth comes out, they won't know what's going to happen next for them.