The general rule for gambling and gaming in Argentina is that they are prohibited unless expressly authorised by a competent authority. This rule was set out in local regulations and, as of December 2024, is included in the Argentine National Criminal Code (the Criminal Code).
You just have to stick to legal, regulated online casino sites such as BetMGM, Caesars Palace Online Casino, FanDuel, Betway, bet365 and BetRivers. They offer great casino game ranges and they will pay out quickly and without any issues if you win.