In case you're interested, here is a transcript of our I-751/N-400 interviews:
We received an email a few days prior notifying me to be there for the combo interview. Appointment was at 1:00 pm Wednesday, December 14th. We were called in at 1:30 pm. Officer said, "You have already submitted a lot of evidence". The officer asked both of us a few questions for the I-751 interview. "How did you meet" How many children? When were you married? Did you pay anyone to fill in the I-751? He wanted to see evidence of marriage dated from I-751 filing date (March 2019) to present. I gave him bank accounts, credit card accounts, apartment leases, driver's licenses, Car insurance card. He did NOT ask for tax transcripts (I had already uploaded them) or original documents. He said "You satisfy the I-751 requirements". He then gave me the option of remaining in the room for the N-400 portion, but wife was comfortable alone. He escorted me back to the waiting room. Wife says he asked her a few questions we had answered in the I-751 interview portion, then asked her the 6 easiest questions in the 100 question list.
Who is President?
What did MLK do?
Why did colonists come to America?
Name one branch of Government?
Name 2 cabinet positions?
Who makes laws?
About 30 minutes later, he escorted her out to meet me. She had the form which says "You passed the English and Civics test".
An hour later, her N-400 status had changed to "Oath will be scheduled". The next day (I think), her I-751 status changed to "Case was approved".
What amazed me was the rate the officers were calling interviewees in that afternoon. They had 10 or 12 officers continually calling people out of the waiting room. We were called 30 minutes after our appointment time.
The officer told us "We are here to help her become a citizen. We are not trying to fail her. Officer said 2 to 6 weeks for the oath.
When we got home from interview, the N-400 status had changed to "Oath will be scheduled". Next day, the I-751 status changed to "Case was approved". On Jan 9, 2023, we received the oath ceremony date.