Looks like the Chinese and other operators aren't being allowed, or not risking, to transit through the Gulf.
Sal Mercogliano:
The Strait of Hormuz just hit double digits transits since the beginning of March, a total of 11 on March 27 & 28.
It should be noted that these numbers are largely due to bulk carriers delivering food to Iran.
In the meantime, Iranian tankers are running the Strait dark*.
*
Ukraine secured an agreement with Gulf states to supply naval drones, Zelensky said.