"Given the 33 km^2 area, if we assume a circle, the body was actually found no more than 3.24 km away from the main crash site."
Reports on finding the toddler were very clear she was found a great distance from the crash site. Greater than 21 miles was what was reported, and investigators needed to greatly expand their search area, especially along the earlier flightpath.
Nowhere in any of the reports was there any ambiguity as to the child being found distant from the crash site.