After a million years, I finally have an update.
Got another RFE on 02/16/22. They wanted evidences of our shared life together. 🙄 My response was an inch-thick file of documents and photos. Status update of receipt on 03/25/22, said our case is on Initial Review. Initial review after almost 2 years, are you kidding me?! 😭
Then I got a text from USCIS earlier that I have a case status update. I thought it would be receipt of my EAD renewal that I sent last week. Turned out to be an AOS status update: New Card Is Being Produced. 🥳 So they approved our case without an interview!