Thank you for the explanation, just one thing:

You are right that colloquial the term Generalplan Ost is often used, which itself brings a few problems with it. It does bring the mass executions in Poland and areas of the Soviet Union and alike under a common umbrella and does itself not differentiate between executions of civilians and Soviet Soldiers for example

I'd consider Jewish soldiers who were executed for being Jewish to be victims of the Shoa, so I don't think the execution of Soviet soldiers for being various types of what was designated as "life unworthy of life" needs to be excluded. Combat deaths are something else, but executions seem to me to be appropriate to include.