The U.S. Embassy in Quito and the U.S. Consulate in Guayaquil are not taking regular passport renewals in person. Everything is done via courier, however, not everyone qualifies to use this service. Please check the following webpage: https://ec.usembassy.gov/passports/#wizard and answer all the questions. At the end, it will tell you if you qualify for this service and what are the steps that you need to follow.