Of all these things when talking about money laundering, it is not possible to act because as many have said, KYC alone is the biggest deterrent to those who try to do it and those who try it would be very foolish, and they cannot Camouflage themselves to be able to do it. things inside the casino and then play and withdraw, I don't know if a player can withdraw little by little what they want or will give them enough time to investigate it, because if a person makes a large deposit and plays a little and then wants to withdraw a little bit of money I don't know if they leave it or submit to a great demand kyc, so these things are what must be seen to think that it is money laundering , I currently doubt it.
As far as I know KYC especially the deeper level of KYC can highly prevent money laundering since the depositors will be asked about the source of funds and need different legal documents to verify the validity of the client that he is not involved in money laundering.
About the withdrawal, each casino has its own preference and security method. I believe their action will be different. but one thing is for sure, these casinos have a threshold before they trigger AML investigation. I believe the wagering requirement is just the 1st layer of security against Money Laundering and the next layer if the player is suspected is the AML in a higher level where the source of funds is asked.