Some casinos provide KYC for their players, this is intended to avoid problems that could occur such as data leaks, I often gamble at local online casinos and they do not ask for detailed KYC, only account numbers and emails, even I think local casinos here do not require visitors to fulfill their KYC in detail, also I have never experienced a personal data leak even though it makes sense if this is a concern because I sometimes feel worried about my own personal data.
I don't gamble on local casino often but let me also say that the few local casinos I've gambled on have never requested I pass any form of kyc verification outside of the one done during registration which is often regarded as basic kyc like typing in name, phone number, email address and sort. This gives me a kind of feeling that local casinos seems to be more soft when it comes to kyc than the international casinos.
But on the other hand, that is very understandable because people don't launder money through local casinos, but they do through international casinos, lets say that most online fraud are committed on global casino than local casino and this is possibly the reason why global casinos are more stricts with KYC verification than local casinos.