Doing a quick test in my LPV Test scene I’ve got LPV working using the steps that have been outlined in the documentation pages with no issue.
Here is my sample images.
LPV Enabled in Light Source
LPV Disabled in Light Source
Visualization of LPV
It can be easier to test LPV stuff if you make a scene similar to mine that way you can create something rather easily that should have light bounce. It can be much easier to see the bounce and color bounce for testing. This way you can rule out where your issues are.
Also add a post process volume to your scene that is unbound and adjust some of the properties in the Light Propagation Volume section.