Are there instances when you use erythropoietin stimulating agents in patients with acute kidney injury requiring dialysis?  

I cannot think of a reason to. ESA resistance is common in sick patients and I think you are wasting the drug. Please see reference: Aoun et al., PMID 35279078'Erythropoietin treatment had no impact on transfusions, renal recovery or mortality in acute kidney injury patients with anem...

I think we need more data and possibly some studies on this topic. most likely majority of patients with AKI in ICU won't respond to it. It also takes a long time for a response even in outpatients.