Can I get fat grafting to fill in my hip dips with sickle cell disease? I'm healthy, never had a blood transfusion

I've consulted my Haematologists about possibly getting cosmetic surgery and they said I can. I have sickle cell, but I've lived a pretty normal life unlike others I don't have to regularly go hospital for blood fusions/treatment. It's also to my understanding that fat grafting to the hips is less risky than a full BBL, considering this too is it possible for me to get the surgery and if so I'm unsure of where I can go? I've asked a few doctors & they've rejected me so far.