Hey.. a good news and bad news for my parents
Good news: the interviewer did take corona as a reason and didnt had issue with more than 6 months absense.
Bad news: I did a miscalculation on number of days in USA - 5 years before and applied 20 days early. so they didnt meet the residency requirement :(. I even told the officer that they have not left outside of USA past 1.5 year. and to consider it. they said no, its the time before the application and not he interview.
they said to apply again, as they qualify again. but they get back into the queue and need to give interview and test again (which they aced)
thats a bummer. wish i was a bit lazy and took another month to apply for them. well it is what it is.