Al Jazeera reports that "Iran said it expects oil cargo confiscated by the United States off the coast of Greece to be returned in full..."

So USA already seized Iranian oil tankers. Iran does the same in retaliation and it becomes news

Source https://www.aljazeera.com/news/2022/6/9/iran-says-expects-confiscated-oil-cargo-to-be-returned-in-full