Why GDP so is so low compared to the US?

GDP can be low compared to the US due to several factors, including a smaller population, less diverse economic sectors, and lower levels of industrialization. Additionally, countries with lower GDP may have less access to capital, technology, and infrastructure, which can hinder economic growth. Political stability, government policies, and external trade relations also play a significant role in influencing a nation's GDP. Finally, the overall economic maturity and productivity levels in comparison to the US can contribute to these disparities.