Where is dYdX available?

Could you please elaborate on the availability of dYdX? I'm particularly interested in understanding the different platforms and jurisdictions where it's accessible. Is it solely available on decentralized exchanges or can it be traded on centralized exchanges as well? Are there any geographical restrictions that limit its accessibility in certain regions? Additionally, what are the minimum requirements for accessing and utilizing dYdX, such as the need for a crypto wallet or specific software? Clarifying these details would greatly assist me in navigating the dYdX ecosystem.