I think I talked with you a while back when I last visited the plant, they also make them in Mogi das Cruzes (Brazil).
The kits go to different places in the US and world, but they do export the whole tractor to various places.
I can only say what I saw with my own eyes that the Canoas plant is a bunch of proud workers and they do take pride in their builds. As for your story I would like to think it was assembled in the US but I do not have proof....this is a state of the art plant with the same QC and ISO measures as the AGCO plants in US or Europe. From what youve experienced I don't really have an opinion about it-just what I saw at the plant. I may not be able to get back in because of the pandemic now.
I have bought Honda products before made in Japan but assembled in US to find the assembly part was really bad-QC was not there.