Hi,
Thank you for the details!
I can’t see too much from the front-end only, but make sure the correct custom post types are selected to be returned as results: https://documentation.ajaxsearchpro.com/general-settings/search-in-custom-post-types
If yes, then make sure the post type selectors are disabled, as those will still have effect even if the search settings are not visible on the front-end.