And, most of that traces back to Bacque. There are some on the list, like McDonogh's After the Reich: The Brutal History of Allied Occupation that use Bacque in part, and then go far afield from anything Eisenhower did like McDonogh's claims about Sudeten Germans being mistreated by the Czech government. That has nothing to do with Eisenhower.
The absurdity of Bacque's claim of somewhere around a million German POW's dying in Western Allied captivity is utterly absurd. The number captured prior to the German surrender was about 2.8 million. Roughly another 5 million were taken into custody post surrender meaning that by Bacque's numbers somewhere between 1 in 6 and 1 in 8 died in captivity. The mass graves necessary to handle the bodies don't exist. The US / Western Allies didn't run crematoria so that isn't where they went.
So, where did all these dead German soldiers end up?
Even a cursory examination of Bacque's claims show how obviously and absurdly wrong he is. To claim that those who did die, and were placed in camps were intentionally and badly mistreated is also clearly a lie. The Western Allies were trying to handle mass surrenders of me in tens to hundreds of thousands once the war ended. Even with the war coming to an end but still going, mass surrenders were problematic. There certainly was no plan to starve these men to death, or leave them exposed to the weather (however mild it might be given it was summer). Certainly the US did try to improve camp conditions as quickly as their resources allowed.
Were there individual cases of brutality by Western Allied soldiers? Absolutely. But it was neither policy nor practice of the armies as a whole.
Ok, you don't like Bacque. So let's leave him out of it. I glanced over what some of the other people had to say. One of them said that the allies confiscated the land on which any mass graves may have been. And they don't allow digging there. I have another website for you to dismiss. Though part of it does mention Bacque.
https://prepareforchange.net/2019/07/22/11-million-germans-were-murdered-after-wwii/
Lastly, you say that what happened wasn't policy or practiced. That was Eisenhower's whole reason for having those taken prisoner after the war labeled as Disarmed Enemy Forces.