If one could somehow see all of space at once, it would be an awe-inspiring and mind-boggling sight. However, it's important to note that the observable universe, which is the portion of the universe that we can potentially see, is limited due to the finite speed of light and the age of the universe.
The observable universe extends as far as light has had the time to reach us since the Big Bang, which is estimated to be about 13.8 billion light-years in radius. Keep in mind that this does not mean the universe is only 13.8 billion years old; it simply means that we can see objects that are within a certain distance from us.
If you were able to see all of space at once, you would likely see countless galaxies, stars, and other celestial objects in various stages of formation, evolution, and destruction. The view would be filled with a vast array of colors, ranging from the brilliant glow of young stars to the dim remnants of dying ones. You would observe galaxy clusters, galactic superstructures, cosmic filaments, and perhaps even hints of dark matter.
However, beyond the observable universe, our vision would be limited. Due to the expansion of the universe and the finite speed of light, regions of space that are currently beyond our observational reach would remain hidden from our view. The actual size and structure of the entire universe, including what lies beyond our observable horizon, remain topics of ongoing scientific research and speculation.