Fog and light shafts are handled together in Buto, which is built specifically for the Universal Render Pipeline. Depth, haze and visible beams of light are what make a lit scene feel like it has air in it, and this effect brings both into a URP project without a custom shader build.
Buto adds volumetric fog and volumetric lighting to URP projects, and it sits in the fullscreen and camera effects group of Unity VFX. It suits scenes where atmosphere carries the mood, such as interiors lit by narrow windows, forests at dawn or corridors with pooled light. Because it targets URP, it fits projects already committed to that pipeline.
Download Buto from Ultimate Game Assets and see how Unity URP Volumetric Fog handles your own lit scenes.