Is it possible that the casino management courses may be allowed to be studied and taught in countries or regions where gambling activities and casino businesses are banned?
I am not even sure what you mean with casino management courses, to be honest, so I assume you are talking about courses which could help people to start their own business within the world of gambling.
If that is the case, I think it would be very unlikely for those studies and courses to be available in countries where gambling is outlawed, like Saudi Arabia, Iran or perhaps Indonesia and Japan.
If one wants to take classes on those topics, the best options would be to do it online and using some tools la VPN and Tor, some the authorities of the government won't have much of a chance to punish you for engaging in forbidden activites.