Thank you for clarifying.I dont know the exact timelines for drop box applications this year. From other threads, it seems to be taking 5-6+ weeks in Canada.
Yes surely you should depart US only after getting appointment slot. If not you cant return back soon since no one knows how long it will take to get the stamping done without upfront appointment. But you may be eligible for dropbox in Canada too(but you will know for sure only after you start applying on website).
Yes, I believe we might be eligible for dropbox in Canada as well since we have our PR cards and have a previous US visa.
We'll have to depart US and travel to India, but still trying to figure out the dropbox process in Canada. @kris72, could you please chime in on how the general availability is for finding dropbox appointments in Canada and what the timeline would potentially look like?