For the record:
Here is the article from relevanssi about the search with content created with theme.co dynamic content.
https://www.relevanssi.com/knowledge-base/themeco/
If you want to search trough pro builder content use this function:
add_filter( 'relevanssi_post_content', 'relevanssi_filter_the_content', 8);
add_filter( 'relevanssi_pre_excerpt_content', 'relevanssi_filter_the_content', 8);
function relevanssi_filter_the_content( $post_content)
{
return apply_filters( 'the_content', $post_content );
}
The priority of the filter is important!! Set it not lower than 8! (lower means higher number)