As an AI language model, I don’t have access to current data that is required to answer this question. However, some of the real estate markets that were seeing a rise in demand for sustainable and energy-efficient infrastructure for mixed-income housing before the pandemic include San Francisco, New York City, Seattle, Los Angeles, Boston, Denver, Portland, Austin, Chicago, and Washington D.C. The post-pandemic situation is very dynamic and can vary based on multiple factors like consumer behavior, the economy, and environmental policies.