The story originated with veteran distinguished US journalist and investigative reporter Seymour Myron "Sy" Hersh [en.wikipedia.org], who claims the information came to him from a leak in the CIA, who conservatively estimated at least $400 million were embezzled after ten Ukrainian generals complained to the CIA that the President was taking more than his fair share of a skim off the top from the American aid. Thus cutting them out of their share. Said general were apparently very surprised to be told that none of them should be taking a skim of the top AT ALL, as it is apparently common practice and expected in the Ukrainian military and government circles. They were even more surprised when Zelensky fired all ten of them for tattling on him.
Apparently the Ukrainians were being allocated $400 per gallon to buy diesel oil from Pakistan and transport it to Ukraine for use by the military. Instead of which Zelensky called up a contract haulier from the pre-war days IN RUSSIA, and paid him to buy up fuel in Russia and drive it over the border in to Ukraine at a net cost of less than £13 a gallon in convoys of tankers.
Wow a eastern European politician financed by Russian Ogliarchs and pally pally with fascist paramilitary organizations STOLE from a western ally, by consorting with the enemy???? What is the world coming to.