Is there a way to “extend” how far the depth of field focus is? Im probably not using the correct terminology.
But instead of focusing on the origin, can I make it so that anything that is inside the empty will be in focus and anything outside will be blurred?
Well, in Blender parlance, an Empty is “a point in 3D space.” There is no concept of anything being “inside of it.”
Can you post a blend-file showing what you have in mind?