During their talk Tony had also mentioned that he flagged Sandy to MACUSA for testing. Her father and mother didn’t have magical cores that Tony could tell so she was likely a muggleborn and would need support when she was of age for America’s magical schools. Given the case and trauma she’d be dealing with it wouldn’t be surprising if accidental magic started appearing externally. Tony was certain her magic was helping her hearing and focused inwardly up until now. MACUSA’s Child Services Division assured him that they would keep track of her and monitor her for any magic.