Non Western aligned vessels are getting through albeit slowly. Several Asian countries have received deliveries of liquid petroleum gas and China is still getting oil. In fact Iran has said they will let oil tankers through if the oil is purchased in yuan (to undermine the petrodollar).

Reportedly there is a secure channel between the island of Qeshm and Larak that they are using to get these ships through.

There are navigators/guides that board the ships and guide them through safely… at least the ones that are approved. It is a very well-paid position that comes with high fees.

Anyone that mines waters keeps charts to navigate through. Since mines were invented. I remember reading about the Japanese getting the Russian charts in 1911 or whatever around then, to invade the far east, where they wiped out the russian fleet, the arrogant russians not fearing a non white country, despite their astronomic industrialization with the help of european powers, and ingenious finance arraangements building industries with government capital then auctioning them to private industry and using that money to start the next industrialization. The most rapid development of any country ever as I read it.