There are very good records of coal delivery to the camps. AFAIK, no one disputes their accuracy. Barely enough coal was delivered to keep the prisoners from freezing to death. The official and very well documented coal and train records do not support the notion of mass cremations.

It's also worth pointing out that burning that much coal in one location at open stack crematoriums would have left considerable radioactive ash over the entire surrounding cities and land. No such radiation has ever been detected. Nor has the associated blanket of ash ever been confirmed.

Keep in mind the Germans were very pinched for fuel. Thus the purpose for the naval blockades. It became so bad they were in fact using their coal to create gas and oil. The process is called coal liquefaction. The military need demanded all surplus coal supplies. Which is why it was cut to prisons. This need is why they pressed so hard into the African campaign. Because Africa provided coal, oil (gas and diesel), and industrial diamonds. All of which they desperately needed.

But, as you can see, when the reduction of coal, of course deaths will quickly rise during winters. So the confirmed 300,000 - 600,000 deaths begin to come into scope. Especially as disease took hold. Eventually ending with mass death of prisoners following their rescue and immediate availability of food. These deaths were accidentally caused by Allies freeing prisoners by means of "refeeding syndrome." Meaning the well meaning Allies killed tens of thousands of prisoners, if not more, simply by feeding them.

You can quickly see how this would become a PR nightmare for the Allies. None of this justifies the mass murder of prisoners who would have never died had they not been there. But it in no way supports the narative forced upon us all or something even close to the 6,000,000 number; which has religious significance to Jews.