Is OKX allowed in the USA?

I'm curious about the legality of OKX in the United States. Given the complex regulatory environment surrounding cryptocurrencies, I'm wondering if OKX, as a leading cryptocurrency exchange, is compliant with the laws and regulations of the US? Could you clarify if it's permissible for residents of the USA to use OKX for their crypto transactions? It's important for me to understand the legality of such platforms before engaging in any crypto activities.