They're (Centralized Website Casino) meaning at least following regulations for most common businesses.

If you looking without (KYC) you should play on Decentralized Casino while everything is on-chain but mostly you have less game to be play or gambler. Also, mostly everything is under written on their term & condition. Before you play or register, just do a quick research
- Term & Condition
- CTRL+F
- Type KYC

You will find it, it's easy and just under 1 mins for find those. All casino website usually have (KYC), I never trust casino claiming with anonymous things always read their term & condition. Casino can ask you KYC in front after you register or in the end.