What network is Bifröst on?

As a seasoned cryptocurrency enthusiast and financial professional, I'm often curious about the underlying infrastructure that powers various blockchain projects. One project that has piqued my interest is Bifröst. However, I'm still uncertain about its foundational network. Could you elaborate on what network Bifröst is built upon? Is it Ethereum? Binance Smart Chain? Solana? Or perhaps a lesser-known but equally promising alternative? Understanding the network Bifröst operates on is crucial for assessing its potential and compatibility with other blockchain-based solutions.