Uh, no. I dont think you understand how co-morbidities work. These are conditions that cause complications when one gets COVID. You dont die from co-morbidities. You die from COVID, which is enhanced by your co-morbidities, such as high blood pressure, diabetes, low vitamin D, old age, obesity, etc, etc, etc.

contributing causes

They still died of COVID, they didnt die of vitamin D deficiency.