The Germans never had a bomb or a program to speak of.
Actually during his trial for war crimes the romanian leader Marshal Antonescu revealed a month before he was hung that Hitler had told him at a conference in early August 1944 of a Uranium atom splitting weapon of devastating force.
Until the day he was lynched Mussolini also spoke relentlessly of Hitler's atomic weapon.
....and of course Mussolini sent a correspondent to witness a test blast at Rugen on the Baltic from a hermetically sealed bunker which Romersa recounted he shared with several Japanese VIP military attaches.
No this does not strike me as odd. USA did not entirely trust the Soviets which is why USA did not share that information but they entirely shared with Great Britain.
Hitler was in a weakened position by late 1944 and particularly in the east with Romania gaurding his flanks and supplying vital oil, Hitler needed to reassure it's leader to keep supporting the Nazi cause. Additionally USA had already communicated a warning to Hitler about his Atomic weapons project via the German legation in Lisbon in July 1944 so it was hardly secret any longer.
The same is true of Japan. Germany desperately needed rubber and tungsten from Japan and japan required german technologies. Hitler had to ensure he did not lose Japanese support and there was a price.