Can I apply for a 60-day extension on my type 0 non-immigrant marriage visa before it expires?

The individual is inquiring about the possibility of applying for a 60-day extension on their type 0 non-immigrant marriage visa, which is set to expire on October 2, 2020, and they would need to leave the country every 90 days. Responses confirm that they can apply for the extension, which does not require proof of income, but recommend going to the local immigration office with their spouse.