Interview Update:
My wife and I had the interview last week. We still haven't heard back about a final decision on our case but I decided to share our experience anyways for your reference.
We arrived at the FO 1 hr early. We noticed that the line was very long and extending outside the building. We were concerned that we would not be able to get to our appointment on time. It turned out that the line we were looking at was for people attending the citizenship ceremony and that there was another shorter line for people coming for the interview.
We entered the building 15 mins before the interview (as per the instructions on the IL), checked-in, and waited for 35 mins before the officer came out and called our number. The officer walked us into his office. We did the oath. He said he will start with me since I am the primary applicant. The interview lasted for 1:45 hrs overall and the officer was very nice. He asked for original IDs. Then he started asking questions from I-485 and made some corrections on the go. We spent some time figuring out what is the proper middle name to use since we don't really have middle names where we come from as per the US standards. The officer was very understanding of the situation and he informed us that he wanted us to do this correctly so that it doesn't cause us trouble down the road when we have our green cards (I was very happy to hear him say that because it sounded like he already approved our case). He asked us how we met, confirmed my current job, and asked most of the Yes/No questions at the end. Then he signed the form and asked me to sign it. Then he moved to form I-944, confirmed that we have health insurance, asked if I filed 2020 taxes. I said no. I gave him my 2019 tax transcript which wasn't available at the time I filed. Then he asked me to sign the form.
He mentioned that everything looks good but that he cannot adjudicate at the moment as he needs to contact KCC to confirm the availability of a visa. He also noticed that I had another application with USCIS (employment-based, not an I-485) and he mentioned that something needs to be done about this other application and that he cannot touch it because it is not under his jurisdiction. He said that the other application will probably get rejected because you won’t need it when you get a green card. I said that is understood. Then he handed me a letter with the outcome of the interview saying that the case is being held for further review.
He moved on to interview my wife. Again, simple questions from I-485, middle name issue fixed, and asked if we have proof of cohabitation. We gave him various documents including car insurance, renter’s insurance, and apartment lease with both our names on them. I had printed the entire apartment lease but he only took a few pages with both our names on. He told my wife the same thing that he cannot adjudicate at the moment before contacting KCC and that he will contact them this afternoon. Asked my wife to sign I-485 and I-944 and handed her a letter with the outcome of the interview same as mine.
On the USCIS website, our status changed to “Interview Was Complete and My Case Must Be Reviewed”. I was hoping to see the approval message on the same day (just like some of the people in this forum) but it has been a week now without any updates. I am not sure if KCC is taking time to reply to the officer or if there is something else causing the delay (maybe dealing with my other USCIS application). I will keep you guys posted. Best of luck to everybody (and to us)!