Hello! My husband and I had our AOS interview on Feb 24, 2021 in Jacksonville. All went well, and they were reviewing our case. On March 23 we got an RFE for a new medical. I did my medical in Canada in Sept 2019 right before they updated the forms so they wanted a new medical on new forms. I got the new medical right away and sent it in the mail, USPS said it was signed for at USCIS on April 13. My online case status still says "A request for additional evidence was sent." I've read in some places the average response time to an RFE is 90 days, is that true with interview RFEs as well? I'm wondering what my next steps should be as it makes me nervous they never even acknowledged receiving my RFE response. I was thinking of submitting an online service request? Help what should I do (if anything).