The idea that everything seems to stop at the edge of our observable Universe is a common misconception. The observable Universe refers to the portion of the entire Universe that we can currently observe from Earth, given the limitations of the speed of light and the age of the Universe.
The observable Universe has a finite size because the Universe itself is approximately 13.8 billion years old, and light takes time to travel from distant objects to our telescopes. Since the speed of light is finite, we can only observe objects that are within a certain distance from us, which corresponds to the distance that light has had time to reach us since the Big Bang.
Beyond the observable Universe, there may very well be more Universe that we cannot currently observe. In fact, current cosmological theories, such as inflationary theory, suggest that the Universe is much larger than the portion we can observe. The observable Universe is just a tiny fraction of the entire Universe, and it is continually expanding as time progresses.
It's important to note that the term "edge" can be misleading in this context. The Universe doesn't have a physical boundary or an edge that one can reach. Instead, the observable Universe has a limit defined by the distance that light has had time to travel since the beginning of the Universe. Beyond that limit, there may be more galaxies, stars, and structures that we cannot currently observe but could potentially be discovered as our observational capabilities improve.