All 40 Flt. 93 PAX & crew were ID'd thru forensics, (small body parts after a 563 mph impact from 40K feet).
https://www.cbsnews.com/news/flight-93-remains-returned/

ThanQ.
Point is, one should notbexpeect to find bodies but body parts. Lots of sifting.
I know a gentleman who worked the conveyor belt in New Jersey after 9/11. Gruesome.
What altitude did the plane in Ethiopa fall from? Certainly a lot lower than 40,000 ft.