Also, something that tends to not be noticed until it happens. The viewport and the camera have different values for the clip end.
The viewport value (Red circle) is 1,000 meter. And when you’re looking in the viewport you can see your circle. Then when you are looking through the camera (green circle) it’s only 100 meters. So if your scene is very big and objects are over 100 meters away, the camera will clip it from view. Unless you move the value up.