@Tonez Hi, did you end re-doing a medical in USA?
Same case here, I just got an RFE "Submit a completed Form I-693, Report of Medical Examination and Vaccination Record" by mail to my local office (It is not a deficiency request which in that case means they lost your medical).
I completed with the vaccines during my medical overseas with K1 visa but I noticed in my USCIS account that several of the documents sent with my AOS were not scanned - including the DS-3025. I applied AOS on Sept 2021, my medical and visa were under the 6 months validation but medical was done before they changed the DS-3025 form that includes the COVID vaccine record and I was off season for flu shot. Still my DS-3025 marks "K1 visa applicant voluntary completed vaccination requirements".
Another K1-AOS filler just replied the RFE by uploading on his USCIS account a copy of the DS-3025 and his GC got approved a month later. So Today, I just did the same: uploaded copy of my DS-3025 highlighted that I completed vaccination and the date summited and, even at that moment was not mandatory, I also uploaded a copy of my COVID card.
*I called a USCIS doctor and she laughed about USCIS asking for another medical when mine was completed overseas. Cost = $310USD.
Has someone else respond the RFE by summiting the DS-3025?
Thanks!