@Katy *******
you show that you're leaving in 60 days and coming back <- meaning you book OUT and IN flights 60 days after your initial expected visa it.
Make a booking to vietnam or somewhere 60 days after your first arrival and then make a booking that you're comin' back a week later. It's JUST to show them why you need a METV. you can cancel them as soon as the visa is approved
Also just show a hotel booking for a week from your arrival date it'll be fine.
AND on any page that is not relevant any more (quarantine, vax history, etc) just write on a paper NO LONGER REQUIRED and take a photo of it because you have to upload something in those questions