We sent in the AOS packet (I130, I485, I765, I131) on 3/18 to the Chicago Lockbox, and I received my receipt notices shortly after (dated 3/24) from the NBC. Then a whole bunch of nothing until late July (a few days after the Chicago ASC re-opened), when I received my biometrics appointment for 8/7. The biometrics appointment occurred with many safety measures to ensure social distancing and protection from COVID-19, and went extremely smoothly. Yesterday my I485 status changed to "Case is Ready to Be Scheduled for An Interview", so things really seem to be moving again.