Digital Public Infrastructure (DPI) is vital for secure digital identity, interoperable payment systems, and data exchange. It serves as the foundation for digital economies, being adopted in various sectors including health, education, and agriculture across South Asia. The examination covers six countries: Bangladesh, Bhutan, India, Maldives, Nepal, and Sri Lanka, identifying gaps, challenges, and opportunities. It also includes lessons from global DPI implementations and provides insights on enhancing development outcomes through effective DPI utilization.