As a follow up, I spent some time trying to get this working. I created a custom query to expose ACF fields within a custom search endpoint. Searching keywords would only return results if it matched the title, or excerpt.
I was finally able to get this working using a combo of SearchWP and the SearchWP API plugins.
I’m not crazy about the fact that I had to use plugins to search custom fields and return results but it’s the only thing that worked.
