Anorexia has an explicitly stated weight criteria. You medically cannot be overweight and have it. If someone overweight is restricting and it's genuinely not a crash diet, then they might have OSFED, but they cannot have anorexia. The point is that they only ever decide they are anorexic because that earns the most sympathy. If they had an ED, they would be honest about it and know that OSFED is even more deadly than AN. The fact that they don't shows they are self-diagnosed and lying.