I once won x500 on a local gambling site in my country. Here we don't need KYC for gambling because gambling is still very illegal here and you can even deal with the law if you are caught.
Most local gambling sites do not require KYC for any requirements but when you win very large amount reaching thousands of dollars or hundreds of thousands of dollars do you believe they will pay it easily without asking for any conditions?
In the country I live in there are also local gambling sites but they are still based on fiat not cryptocurrency and they run the site without asking customers for KYC but there have been several cases where gambler won approximately $15,000 and the gambling site didn't pay it and froze the account along with all remaining balance.
Until now I still use local sites but only with small bets because I prioritize crypto casinos if I really want to have fun with more money.