I don't know the right word to use for the casinos that function on a national level, those that are allowed by the government, in other words. For instance, in Greece we have Stoiximan, Novibet, and many others. Those have all your personal details and automatically deduct taxes for any earnings you withdraw above €100. I'm not sure what to call them, which is the reason why centralized probably wasn't the right word. For instance, Roobet, Rollbit, Stake, and many other cryptocurrency casinos are blocked in Greece because they supposedly do not have a license and are put on a blacklist. In reality, they don't have any authority over them, thus can't earn money from taxes; they're trying to contain the gambling community to the available "national" options.
Ah, I see. Finding the right term could indeed be difficult.
With my limited vocabulary, the closest term I could think of for gambling platforms you mentioned "on national level" would be fully-regulated local gambling platform/casino 🤔
As for gambling platforms like rollbit, roobet, and similar others. I typically just call them off-shore gambling platforms -- you'll know it if they have licenses from curacao, anjouan, etc.
Lmk what you all think, or perhaps, others have better suggestion/s which I would very much welcome.