Solar eclipses are only seen by certain areas of the Earth because they occur when the Moon passes between the Sun and the Earth, casting a shadow on the Earth's surface. However, the Moon's shadow is relatively small in size, and it only covers a small area on the Earth's surface as it moves across the planet during the eclipse. This means that only a limited number of people in specific regions of the world are able to see the eclipse.
In contrast, lunar eclipses are seen by many more people because they occur when the Earth passes between the Sun and the Moon, causing the Earth's shadow to fall on the Moon's surface. The Earth's shadow is much larger in size compared to the Moon's shadow during a solar eclipse, and it is visible from any location on the night side of the Earth during the eclipse. This means that lunar eclipses can be seen by anyone on the night side of the Earth, as long as the Moon is above the horizon in their location.