I am able to find Admin 0-2 Boundary data from HDX, however I cannot find a data source for admin3-4 polygon boundaries for Argentina.
Can anyone point me in the correct direction? Thank you!
You may want to check the Openstreetmap.org admin boundaries which you can easily download from this nice web site: https://wambachers-osm.website/boundaries/
It is ordered by country, hence easy to navigate. Download is provided in vector formats.