Does Huobi work in USA?

Could you clarify for me if Huobi, a well-known cryptocurrency exchange platform, is operational within the United States? As a cryptocurrency enthusiast, I'm interested in understanding the extent of their global reach, particularly in regards to their services being available to American investors. Are there any restrictions or limitations on Huobi's operations in the USA? Additionally, I'm curious about any potential regulatory implications or compliance measures that Huobi has taken to ensure they can serve the American market legally and ethically.