How can I get wp_search to find ACF Relationship content?

We have some product pages that load content from custom post type entries into tabs via ACF relationship field. Is it possible to make that content searchable? We're using a custom post type to load up the content for tabs since it's being used in multiple places. The CPT isn't searchable so we need to make sure when the content is loaded on a product page, it is visible to search and the product page shows up in results.

Any suggestions?