@Ketrina *******
I'm asking if you were applying for a non-Immigrant Type visa OR if you were just applying for the 30 day extension based on the embassy letter stating you can't travel due to covid.
IF you had the documentation to apply for an in country 90 day non-Immigrant Type visa (of some type) they would have hard stamped you and then let you apply for the visa (as evidenced by other people who went thru the process).
I'm asking IF you were going to apply for a Non-Immigrant visa or if you only were going to use the embassy letter to get you a 30 day unable to travel due to covid extension dated as starting on the 27th of Sept.
Your answer makes a BIG difference on why things went the way they did for you