My 10-year B2 visitor visa expired in September 2021, so I need to apply for a new one.
However, I know there is a massive backlog at the US Embassy at the moment, because they have only just reinstated visa application services after more than 1.5 years, so there will be almost 2 years' worth of visa applicants all trying to book appointments at the same time right now.
I'm glad you posted the information about the next appointment availability though, because I had been hoping I might be able to get an interview before the end of Feb 2022 (as I'll be working overseas from March to June 2022 and may have had the chance to travel back home via Florida), so knowing the next available is not until September 2022 helps me to plan when I might be able to get a new visa, and therefore when I might be able to travel to the US again.
In regards to your wife's application, is it possible for her to see availability for appointments at the US Embassy in Belfast instead? Or is the application tied to the London embassy?
I would imagine though that it's going to be very unlikely she will be able to get an appointment before February.
Under normal circumstances, they advise applying 4 months before travel, but because of Covid, I read the other day that they have extended that advised time to something like 10 months before travel.