Thought I give an update:
Just got RFE requiring submittal of completed form I-693 (report of medical examination and vaccination record). See below for RFE letter.
We're planning on moving forward with getting remaining vaccination to meet the minimum requirements. Even if series of shots are required to complete vaccination, only need one shot of each required vaccine to complete I-693.
https://www.uscis.gov/tools/designated-civil-surgeons/vaccination-requirements
https://www.cdc.gov/immigrantrefugeehealth/civil-surgeons/vaccinations.html#anchor_1506438009968
also screenshot of table 1 below
Then we're going to find uscis civil surgeon to do the full examination. We're not going to debate/argue with USCIS on this since we don't know what is our chances of winning the argument. Not the best situation to be in with this RFE, but quickest solution is to complete I-693.
Even though our DS-3025 was complete and submitted, we still received this RFE. But, sounds like a lot of people are getting this same RFE requiring completed I-693. This is possibly due to the recently adjusted hepatitis b age requirements (which were extended to 59 years old), see forum post below.