Exclude KB Articles Parent Pages on Search Result

Problem definition

Parent pages in confluence are showing up in search results and they are only used to logically group KB articles together.

Customer is looking for to use page hierarchy to structure content in the knowledge base space, without the page hierarchy(any parent pages) showing up as knowledge articles themselves when users search via JIRA Service Desk.
Still the entire KB is searchable, except for any page that is a parent page. As parent pages in the knowledge base are used for hierarchy and not content.