What network is pyusd on?

Could you please elaborate on the underlying network infrastructure that supports the pyusd token? Specifically, I'm curious to know if pyusd is built on a decentralized blockchain like Ethereum or Bitcoin, or if it leverages a different type of network altogether. Understanding the technological foundation of pyusd is crucial in assessing its potential and evaluating its place in the cryptocurrency ecosystem. So, in essence, I'm asking: What network does pyusd operate on, and how does this affect its functionality and adoption?