Is there s relationship between diabetes and anemia?

Glycation. Poorly contolled diabetes by itself promotes red cell desctruction through increase glycation of red cell proteins.
Could be. One way they might be related is if the diabetes leads to kidney disease. Chronic kidney disease can cause anemia. Diabetes raises the question of good nutrition, and malnutrition of various sorts can cause anemia. Diabetes and thyroid disease sometimes occur together and thyroid disease can contribute to anemia as well.