If you weren't in the critical period (between RFE and decision) I'd ask if you have applied for advance parole, however in this case even if you've got it, I'd recommend against any international travel until you have your green card in hand for one very simple reason: It's easier to fight any possible denial while inside the US, if you get denied while abroad you're kinda just screwed and would have to do a whole another process of getting an I-824 to transfer the case to NBC, then DS-260, medicals again, consular interview, and it's just a massive mess to fix.
I'd recommend reaching out to your senator or congressman and having them contact USCIS on your behalf over attempting an infopass. The process is pretty simple, you go to their house or senate page, look for contact link, send them a message explaining your situation, they will send you a privacy release form that you will then need to fill out, sign, and send to them. They will then send that to the USCIS congressional liaison that will make whoever is sitting on it take a look and report back. It's not uncommon to hear "it'll be done when it's done" and then a day or two later see something happen because someone had to pull them out the stack to investigate and at that point they might as well just push it forward.
I do not recommend trying infopass with VAWA cases. The privacy protections of VAWA simply hide most things from view of rank and file employees so they might see very little or see nothing at all, especially now when it's unclear where the case is currently at. RFEs for medicals typically originate from the NBC (in Lee's Summit, MO), but they can also originate from the local field office, and theoretically they could also originate from Vermont/Nebraska. The field office has geographic jurisdiction, they were able to tell you which one it is by where you live even if their system didn't show them anything.