Generally, the I693 is not provided to the intending immigrant, but they should have received a copy of the DS3025. My now wife got a copy of the 3025 back in 2014, but it is possible things are different now. That being said, the I693 and DS3025 should have been transferred by the consulate to USCIS, so you should be good there. The hangup would be if the DS3025 was not marked as complete. I would sift through whatever papers your now wife brought with her when she arrived, to see if the DS3025 is in there.
As to the interview, you should be fine, but if the copy of the DS3025 is not marked as complete, the worst case would be getting another RFE to complete it which more than likely would require another complete medical exam by a civil surgeon as most will not simply do just the vaccinations.
Good Luck!
I am going to move this to the AOS forum as you may receive more responses there.