Some of the filters don't know light modules.

The filter on the very left "From module" only lists Maven based but no file based light modules.

When filtering "Grouped by"="module name" - the light-modules are not listed on the module.

However, the registries are aware of the items form the light-modules. When choosing "the right filters" (or no filters) it is possible to find the items from the light-modules.

Note that this was figured out with a custom value for magnolia.resources.dir (maybe it works fine when using the default location; no idea).