Don’t make too much about anything you hear about Russia/Iran being on the “outs.” They are pretty much married to each other and have been since well before WW II. They do a huge amount of mutual bizness via the north/south railroad that they share, that runs from the Gulf to the Caspian. It was the back door we used during WW II to supply Russia with hardware and it still is a major Russian supply line to the interior.
The old Iran is over. New Iran coming soon.