Set header image on product pages to main product image - in Essence Pro theme. https://damiencarbery.com/2018/09/set-product-hero-image-in-essence-pro/

essence-pro-product-header-image.php

<?php
/*
Plugin Name: Product Header Image for Essence Pro
Plugin URI: https://damiencarbery.com/2018/09/set-product-hero-image-in-essence-pro/
Description: Set the header image to a product image in Essence Pro.
Author: Damien Carbery
Version: 0.1
*/


// Retrieve first product image if on a product page.
// Use this short-circuit filter to make it quicker on product pages - if the 'genesis_get_image'
// filter was used then the 'genesis_get_image()' function would have unnecessarily called a
// number of attachment related functions (which involve database queries).
add_filter( 'genesis_pre_get_image', 'dcwd_get_product_header_image', 10, 3 );
function dcwd_short_circuit_product_header_image( $false, $args, $post_obj ) {
	if ( wc_get_page_id( 'shop' ) == $args['post_id'] ) {
		if ( is_product() ) {
			$featured_image_id = get_post_thumbnail_id( get_the_ID() );
			list( $image_url ) = wp_get_attachment_image_src( $featured_image_id, 'header-hero' );
			return $image_url;
		}
	}
	return $false;
}