I’ll add what I can, hope it helps piece it together

The term Vergangenheitsbewältigung (coping with the past) is used a lot when describing the German efforts to confront and move on from WW2.

East Germany was a communist state following the war, and refused to accept responsibility for the holocaust. The belief was that these were the failings of capitalism, not the failings of a German state. This would have helped in the initial 30 years to shift blame while recovering from war.

Following reunification in 1990, Germany was able to, and more willing to accept and honor. Many memorials have been built to honor the victims, and any sites linked to Nazism have been destroyed. The sites for the Nuremberg rallies and hitlers bunker have been turned into car parks to avoid them becoming Nazi shrines.

Many (ex)Nazis were also tried for their crimes beginning in the early 60s. One of the biggest cases was of Adolf Eichmann who was part of the planning of the Final Solution, and the transportation network specifically. He was illegally extradited from Argentina, taken like a hostage to Israel (a country that didn’t even exist during WW2) and Israel tried him under a brand new law so they could execute him. While many people would stugge to defend Eichmanns actions, it’s worth noting he did nothing illegal according to the state he was in at the time, and the Israeli government broke international laws while conducting their kidnap trial. He, and many others are used as examples of how seemingly normal people who ‘followed instructions’ ending up committing war crimes. Source: Eichmann in Jerusalem.

Turkey on the other hand refuses to acknowledge the genocide. Most sources say they refuse blame because guilt = reparations. They are also territorial disputes with turkey and Armenia that the Turkish govt are not willing to risk losing. I feel national pride is also a big factor in Turkey.