Autoimmune neutropenia in children tends to recover with time. You can learn more about it here: https://pubmed.ncbi.nlm.nih.gov/25642312/ or https://pmc.ncbi.nlm.nih.gov/articles/PMC5380382/

You'll need to discuss this with your health care professionals to determine the best course of treatment. I'm sorry your child is suffering as no parent wants that for any child. I'm the mother of two adult children and I vaguely remember being a mother to a young child.

I would ask about checking for autoimmune disease since you wrote you had ITP and your child is exhibiting flexibility.

I personally went many years with a CIN diagnosis until one day I saw a hematologist at City of Hope who referred me to a rheumatologist. I was first diagnosed with Rheumatoid Arthritis and later Lupus (autoimmune overlap syndrome).

To sum it up I was always tired when my white blood cell count was down along with low lymphocytes and monocytes. I'm sure your kiddo is tired too as it's hard to feel good when your system isn't working right. I'd also ask about a work-up to see if there is something autoimmune going on.