I don't fancy anonymous casinos anymore because some of them will claim to be anonymous but when you win big, they'll ask for KYC verification before you can withdraw your win. I have seen it a lot of times. I will rather save myself from the stress and just go for a regulated casino. Anonymous casino can do away with your win and there is nothing that you can do about it.
That's also one problem with these casinos claiming to offer no KYC but when they feel like they don't want to send the money won by a user, they tend to ask KYC which later they will sometimes accuse of multiple accounts.
There are still anonymous casinos but there is no sports on it and only few games on it. And usually they are casinos with native tokens.