We received the RFE for the son which was "Please issue another I-693 form."
Backstory on this, since the war was starting to brew in Ukraine, my wife received her second dose of covid 19 (required to immigrate at the time) a few days before we rushed them out of the country (which was a miracle since the airport was destroyed a couple days after they flew out). She was able to complete her dose by staying out of the US for the remainder of the 2 weeks, but of course it was not documented on the DS medical form. So before we performed the AoS, we grabbed medicals for her and the son at the local civil surgeon we found here in Houston. At that time, they gave us a copy of the immunization records page so we could also provide this to the school/daycare/etc and it shows that he was not age appropriate for COVID 19 (he was 5 and a few months at the time). Now a year and a half later, USCIS RFEs us asking us to provide it again. I am checking each medical facility to see but the first I called said my son (who is now 6 years and some months) has to have 1 dose.
I was trying to defend against the dr's office who originally did the medical and said it's valid for 2 years instead of 1, but I read what I-693 says and it says the document is valid for 2 years. The document they packed in the envelope and we sent off to USCIS. So if it is lost, it is understandable that any copies are no longer valid.
We are going to do what we need to do but, that is where we stand. I know we are only a few weeks away from an approval after turning everything in (at least pending any weird mistakes that I won't focus on) but man, it is fun.