This is false. The Earth is an oblate spheroid, which means it's mostly round but slightly flattened at the poles. The image you shared is just a zoomed-in, curved perspective of Earth from space—exactly what you'd expect on a globe. You can see the curvature for yourself with high-altitude balloons, satellite images, or even by watching ships disappear hull-first over the horizon.

Check real-time images from weather satellites or the International Space Station (ISS) live feed to see the Earth's true shape: