What chain is pyusd on?

Good afternoon, I am seeking clarification regarding the specific blockchain technology on which the pyusd token or cryptocurrency operates. As I am conducting thorough research on digital currencies, I am interested in understanding the underlying infrastructure that supports pyusd. Could you please elaborate on the chain it utilizes? Additionally, if there are any specific features or advantages of this chain that make it suitable for pyusd, I would greatly appreciate your insights. Thank you for your time and assistance in this matter.