Let’s assume a big stable wormhole and the gravitational forces of surrounding supporting objects are balanced perfectly, so a human can pass through in a small space capsule in the center.

In this scenario, you would just see the region of the other side twice and the space in between, a circle around the hole, stretched until you’re going through. While going through, some objects on the outside would look stretched.

If it’s not perfectly balanced, you won’t survive going through without being squished or torn. If you come too close to avsurrounding supporting object, you’ll get slingshotted away or will fall into them.