"Volumetric Lights And GodRays Unity Urp" is the perfect, easy and cheap way to simulate godrays, depth and volume.
Engine: Unity 2020+, 2021, 2022(tested)
Pipeline: URP-only
I'm just giving you free access to a ready-made solution that I plan to improve in the future.
Does not work from a local light source! Works with global direction light only. Below is an example of a scene with night lighting.
Setting up: Setup your project -> Graphics -> Render Pipeline -> Add Render Feature