It was even simpler than that. The timeline of development, test, and preparation for bomb-ready deployment did not fit the progression of the war in Germany. Essentially VE day happened before the US was ready for such.
Not to mention the fact that is was the kraut scientists that helped developed the A Bomb and were still under suspicion as to their loyalties.
Maybe they slowed down so that the war in europe was over before the bombs were ready.
Remember, we had no back up for them, if the japs hadn't called it a day, oh boy.
True. The “Trinity” test didn’t take place until over 2 months after Germany had surrendered.