Besides the utter lunacy of nuking other/occupied countries there are several wrong points in this scenario:PS... one atom bomb on Ploesti. Then hit Baku. Then start with the LW airfields, no pilots, no fields, no oil, no defense at all. It may cost 100 B29s. in decoys and feints to scatter the defense and achieve the outcomes. Result? Look upthread at the cataclysmic costs and implications. Atomic bombs are an absolutely horrific political order of magnitude difference in the war-crimes calculus involved. It is also an almost impossible defense problem because even if only 25% of the missions reach objectives, the damage inflicted and the results are enough to force capitulation by any sane polity. Even Nazis, be damned as they are for prolonging a war beyond any reason after 1943; they will QUIT.
1. OTL in the late 40´s or early 50´s the US estimated that it would take 400 nukes to defeat the USSR, ATL the number for Germany would be probably 300. Which was the stockpile of US nukes by 1950. By which time the war would have been over since half a decade.
2. It will be the Wallies prolonging the war beyond any reason after 1943, pretty much everyone else will see the fact that the war is over with the defeat of the USSR. Or with the defeat of Japan at the latest.
3. The US produced just 65 B-29´s capable of carrying a nuclear weapon, only 32 were operational at the start of 1948. In order to handle the weight of an atomic weapon, these aircraft had no gun turents or plating armour: https://en.wikipedia.org/wiki/Silverplate
So these aircraft are flying targets, against an ATL German AA defence system much much stronger than OTL, against more developed German aircraft than OTL and there are far to few of these aircraft anyways. And then there is the fact that if the US uses the Nuke, the Germans will react with chemical and biological weapons against the UK, so the UK will be against the use of the weapon. Meanwhile the Wallies are running out of manpower, because of R4M, twin fuse ect their aircraft losses are beyond sustainable and Allied populations will demand some sort of peace or a Cold War instead of a hot one.