Preventing the transportation of Russian oil by EU ships draft was removed from the EU sanctions package with the insistent request of Greece. Currently, almost all Russian oil is carried by Greek shipowners. But their paid trolls are as busy as they always are, manipulating everything and trying to overshadow their own hypocrisy.
On the other hand: If the USA order, Greece can seize oil on the Iranian ship and deliver it to the USA. However, Turkiye cannot do the same. If it does, it will be called lawlessness.
We can inspect the Russian ship in our territorial waters within the framework of the possibilities recognized by maritime law. However, we cannot steal the property of a ship that shipped from the non-war port and documents are suitable for work.
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A suspect is a person who is investigated by the public prosecutor's office and the law enforcement (police, gendarmerie, coast guard) under his command on suspicion of committing a crime. If the crime is proven as a result of the investigation: criminal case is filed against this person, he or she will be called a defendant from this stage on. Otherwise, You cannot convict suspects. Unfortunately, there is no proven crime. Even in the US media they shared, the situation is described as a suspect.
Unless there is a crime that can be proven, the authorized bodies of the Turkish state and the law enforcement officers affiliated to them cannot carry out unlawful acts.
These are principles of a largely universal justice system. The whole forum knows that my Greek friend Akritas who accuses Turkiye here is unaware of the law and could thinks that the country that can afford it can engage in all kinds of unlawfulness; but unfortunately, in countries other than Greece, these things do not progress as he imagined.