B1/B2 renewal

Hi VISA RELATED DISCUSSIONS

I'm in USA on B1/B2 Visa my visa expires this year October 2021 after using it for 5 years . My country in Asia is lockdown, I would like to know if I could renew my visa in USA or do I have to go back to my home country to get the visa renewed . Any other suggestions I could renew my visa being in USA , I'm eligible for drop box but still I have to fly from usa .

Thank you