When you do uninstall a package, yes, it will provide you a type Lightning Component bundle reference:
However, if you proceed with uninstalling:
You will be provided with further details. Unfortunately, the community pages are not explicitly mentioned, but, there is a link that you can select which will take you to the community page where it is referenced by in the lightning component bundle, allowing you to delete it or un-reference it in your component, for Example:
Clicking on the hyperlink to the far right will redirect me to the community page where the component is being used or referenced.