status of my petition has changed yesterday to "Response To USCIS' Request For Evidence Was Received", but I never received an RFE.
"On August 16, 2021, we received your response to our Request for Evidence for your Form I-140, Immigrant Petition for Alien Worker, Receipt Number LIN212*******. USCIS has begun working on your case again. We will send you a decision or notify you if we need something from you."