Here with happy news! My oath ceremony is scheduled for 3rd April.
I had my combo interview on 27th Jan and the officer recommended it for approval right away. Status also changed to Oath ceremony will be scheduled the same day. And then crickets! But finally, oath letter got updated in the portal today on March 7th.
If anyone from St. Louis is waiting, looks like they are backed up with oath schedule. So don’t worry if you don’t hear back quickly after your interview. Hope my timeline throws some light on yours 🙂