How do I get object culling back?

When creating a new project, by default, the engine does not render objects that are not in view of the camera (but still renders objects that are obscured by other objects), I’m still confused regarding the different types of culling so I not sure if this is frustum culling or dynamic culling.

Regardless, after experimenting with lighting for a coupe days, which involved messing with the rendering and lighting settings, as well as other things, I realized that object culling no longer works.

For optimization reasons, what did I possibly changed for this to happen? And how can I get it back?