We can't use this one as a reason if the casino is not allowing the use of VPN. Regardless of the situation of our country's internet service provider, we must follow the terms of service we had agreed when we signed up to paly in the casino casino.
Exactly since we always need to follow the rules set by a casino regardless what is the current status of your country and if they said that don't use VPN then try to follow it so that we won't encounter any issues and csn continue to gamble on their casino. Reading TOS is important to do so they would know what is good and bad for them.
Maybe KYC has been triggered because of changes of activity and casino want to verify something on the account that's why they try to ask that KYC so that maybe they want to know if the account still safe or intact to the real user. But I also don't think this one can trigger KYC that's why we can only guess some cases on why they ask that on this situation.