Cracks in relations between Moscow and Tehran. Russia is not sending the advanced Sukhoi Su-35 fighter jets to Iran. Supports the UAE’s sovereignty over the three islands in the Gulf held by Iran

This week marks one year since Iran began sending suicide drones to the Russian military in Ukraine.
UAVs play an important role in the Russian attack on Ukraine.
Moscow pledged to the Iranians that in exchange for the suicide drones, it would send the Iranian Air Force the most advanced fighter plane of the Russian Air Force, the Sukhoi Su-35. A few months ago, Tehran transferred the payment for the advanced planes. However, in the meantime, Moscow is not transferring the planes to the Iranians.
Commander of the Iranian Air Force Brigadier General Hamid Wadi Brigadier General Hamid Vahedi said a few days ago Because regarding the purchase of the 35-Su from Russia that we need, we do not know when they will reach our squadrons, Regarding the purchase of Su-35 fighter jets [from Russia]we need them, but we do not know when they will be added to our squadron.
Iran has been waiting a year to receive the advanced aircraft since the Russians promised to send it by 2023, but for now there is no sign that the Russians are going to send it. The words of the commander of the Iranian Air Force show that Iran is not sure now that it will receive these planes at all.
American intelligence sources raise the hypothesis Because the close relations between Moscow and Jerusalem meant that the Russian planes would not reach Iran. According to these sources, on June 13, senior Russian officials and Israeli officials held a meeting that was defined as ‘open and frank’, where the delivery of these planes to Tehran was discussed.
This week, Moscow issued a statement that it supports the decision of the Gulf Cooperation Council Gulf Cooperation Council- GCC It states that the sovereignty of the three strategic islands in the Gulf of Great Taneb, Little Taneb and Abu MusaGreater Tunb, the Lesser Tunb, and Abu Musa, Belongs to the United Arab Oil Principalities UAE. On these three islands there are military bases of the Iranian Revolutionary Guards.
In this way, Moscow supports the Gulf countries and not Iran.