In September 2017 during the Equinox, 23 amateurs from 9 countries measured the shadows cast by a vertical pole at solar noon
They gave their data, including photos of the measurements, to a Youtuber called Sly Sparkane
All of the photos as well as GPS locations for each person is shown in the video
He then mapped them onto a flat plane and saw no correlation indicating a single local Sun
Then he mapped them onto a sphere and saw all angles fell within one degree of parallel
This is what Eratosthenes did over 2000 years ago, but he did it with many more data points
The Flat Earth is thus disproven by sticks and shadows
https://youtu.be/V03eF0bcYno?t=420 
