Steps I followed:
1 - Initially started URP project, later checked if it is installed or not from package manager.
2 - Installed Post Processing v 3.0.3.
3 - Added a custom layer called “postprocessing”
4 - Added Post Processing Layer component to the main camera.
5 - Applied the layer “postprocessing”.
6 - Selected Differed from camera settings.
7 - Created a new game object.
8 - Changed its layer to “postprocessing”.
9 - Added post process volume component.
10 - Created a new profile.
11 - Made it global and so on.
12 - Added effects.
I don’t know what i am missing can you please help me?