My wife(primary applicant) completed a soft landing this Saturday (13-feb-2021) at the buffalo peace bridge land border. I couldn't go cause my H1b is in extension and planning to do the same after its approval.
I dropped her at the US customs border and hired a taxi which has cross border permit. She dont have license to drive a car otherwise you can use your own car.
Taxi took her directly to Canada customs and below questions were asked by Canada CBP officer
1.not moving permanently?
2.Where is your husband? Why is he not accompanying you now?
3.when are you planning to move permanently?
Somehow she convinced the officer with her answers along with the proof of docs that we prepared.
Finally he agreed and asked Canada address to apply for a PR card and asked her to enroll things to import. Whole process took around 40 mins and Taxi took her back to US border
At the US border she used the Automatic Visa Revalidation process as recently her Change of status happened from H4 to H1. No valid stamping but she was holding a valid H1 approval copy along with non expired I 94.
Things were really smooth at the land border. Hope this helps if anyone is looking for soft landing