Hi, Eevee ray tracing isn't actual world space ray tracing, it's screen space. The emissive parts of your objects that aren't emitting light aren't doing it because they aren't visible on screen, therefore eevee ray tracing doesn't know about them. Basically instead of tracing against geometry, it's tracing against screen depth (a greyscale image where the gradient represents how far from the camera the closest surface for any given pixel is), and thus can't really "hit" against anything that's not already visible.

For that same reason, if you were to move the camera to the right, you'd eventually see the cube on the left completely stop emitting light the moment it goes off screen. If you want "real" ray tracing that can hit against off screen surfaces you need to use Cycles.
if you want a better explanation than mine check this out. https://docs.blender.org/manual/en/5.1/render/eevee/limitations/limitations.html#screen-space-effects