I see no ships docked in Iranian ports except a search and rescue boat
Let me see if I can find it again. I found it depends on which service you use, some are more detailed and show more vessels than others. Also draft is an issue for a vessel that size and would have to be anchored out further from the actual port, especially if loaded and displacement is maxed out.
It just says “Tanker... Position received via satellite”.
Could be it? The red dot in the center of the map.
https://www.marinetraffic.com/en/ais/home/centerx:56.346/centery:27.069/zoom:13
I may have steered myself wrong, I found two more in that area that are also unidentified. Can’t get details because they are behind a paywall at this site.