One more data point for others that might be waiting:
I passed the exam for the first time in November 2020, but the exam website had a bug where they couldn't register images from my webcam, so had to contact them and wait 5 more months to get a new exam date in March.
DM in June, and finally got scheduled for oath ceremony for Jan 24th.
I imagine the reason it took this long is because my application got classified as complex after the webcam issue.
However I still did not receive the email for the ceremony with 1 week to go, so I might not be done just yet...
@MaryC When did you receive the email for the ceremony roughly? (if you did receive it)