The sun can indeed be seen from outer space. In fact, the Sun is one of the brightest objects visible from space, and it is visible from all points in the solar system as long as there is no obstruction in the line of sight.
One reason why the Sun may appear dimmer or less visible from some perspectives in space is that it is surrounded by a bright, glowing corona of gas and particles that can obscure its disc. Additionally, when viewing the sun from the surface of the earth, we are looking through the earth's atmosphere, which can scatter and absorb some of the sun's light, making it appear slightly dimmer than it would in space.
But in general, the sun is a very visible and prominent object from outer space, and it is often used as a point of reference for navigation and orientation.