What countries is Kraken banned in?

I'm curious to know, what countries have imposed restrictions or bans on the cryptocurrency exchange platform Kraken? Are there any specific regions where Kraken's services are not accessible or where its operations are limited? I understand that the cryptocurrency landscape is constantly evolving, and regulatory frameworks vary widely across nations. Hence, I'm eager to understand the global scope of Kraken's reach and any potential limitations it faces in terms of geographical accessibility.