<?php //* do not include php tag

add_filter( 'schema_acf_field_post_type_select_choices', 'schema_acf_field_post_type_select_choices_add_product_45263542' );
/**
 * Schema Premium Plugin: Add missing post type "product" to Locations post type select choices
 *
 * @since 1.0.0
 */
function schema_acf_field_post_type_select_choices_add_product_45263542( $post_types ) {

	 $post_types[] = array(
                'value' => 'product',
                'label' => 'Products'
            );

	return $post_types;
}