same here, as crypto regulation is not yet really established from where i am living today. also, if you are playing on a crypto casino where you are not required to do kyc, it means, you are fully anonymous, then, it is your prerogative if you want to declare your winnings to your government. because the govt won't know your winnings from a crypto casino unless you disclose it to them. that's the perks of using a crypto casino at the moment. so better take advantage of such perks.
however, if you won from a local physical gambling site like from the lottery, there's always tax that you need to pay even if you are non-resident.
Even though there are still many sites that are blocked, we still have a way to enter these gambling sites, right? That's the case in my country, even though many sites still don't get permission, but there are ways for people who want to use.
VPNs are an alternative to circumventing blocked sites and most people do that, the anonymous nature will never be noticed by anyone, but when you make a winning clamp and withdraw your balance to the bank, that's where it will be taxed according to the rules. Systems that have been integrated with one identity data gate will usually be monitored, especially if we often deal with money that is converted to the bank, it is different if we play physical gambling such as lottery and other gambling.