No - You Can NOT See The Earth's Curvature From an Airplane

"Funk, who spent six decades attempting to reach space as a trained astronaut, said: ‘We went right on up and I saw darkness. I thought I was going to see the world, but we weren’t quite high enough.’

https://commons.wikimedia.org/wiki/File:Earth%27s_curvature_from_37,000_ft_%2B_ISS.jpg

https://commons.wikimedia.org/w/index.php?title=User:Jim_slater307&action=edit&redlink=1

https://foxnomad.com/2019/04/18/can-you-see-the-curvature-of-the-earth-from-a-plane/

https://oceanservice.noaa.gov/facts/highestpoint.html

https://pressnewsagency.org/blue-origin-astronaut-says-jeff-bezos-flight-didnt-go-high-enough/