If you choose any top level casino then most of them do not have KYC Mandatory in the initial stage but later they may ask for KYC verification according to your activity. Moreover, currently every licensed provider is making KYC verification mandatory as an anti-money laundering act. As a result, it is very rare to find non-KYC casinos among the reputable casinos.
However, if you want to play at decentralized casinos, you won't have to face any hassle with kyc verification there. In this case, I would suggest DGbet.fun. But remember that casinos that require KYC verification are safer and have more features.