Add a custom post type to your WordPress site to add the functionality for Funnel Packs as a Post Type. This does require Metabox.io FREE to function but you could replicate the same process using ACF or any other method.

stoute-funnels.php

<?php
/**
 * Plugin Name: Stoute Funnels
 * Description: Adds the custom post type and metabox.io fields for funnelpacks.com funnels. Plugin requires the metabox.io free plugin.
 * Version: 1.0.12
 * Author: Paul Stoute
 * Author URI: https://paulstoute.com
 * Text Domain: stoute_funnel
**/


/**
 * Register the CPT for the Funnels
 * Since @1.0.8
**/

add_action( 'init', 'stoute_funnel_register_post_type' );
function stoute_funnel_register_post_type() {
	$args = [
		'label'  => esc_html__( 'Funnels', 'stoute_funnel' ),
		'labels' => [
			'menu_name'          => esc_html__( 'Funnels', 'stoute_funnel' ),
			'name_admin_bar'     => esc_html__( 'Funnel', 'stoute_funnel' ),
			'add_new'            => esc_html__( 'Add Funnel', 'stoute_funnel' ),
			'add_new_item'       => esc_html__( 'Add new Funnel', 'stoute_funnel' ),
			'new_item'           => esc_html__( 'New Funnel', 'stoute_funnel' ),
			'edit_item'          => esc_html__( 'Edit Funnel', 'stoute_funnel' ),
			'view_item'          => esc_html__( 'View Funnel', 'stoute_funnel' ),
			'update_item'        => esc_html__( 'View Funnel', 'stoute_funnel' ),
			'all_items'          => esc_html__( 'All Funnels', 'stoute_funnel' ),
			'search_items'       => esc_html__( 'Search Funnels', 'stoute_funnel' ),
			'parent_item_colon'  => esc_html__( 'Parent Funnel', 'stoute_funnel' ),
			'not_found'          => esc_html__( 'No Funnels found', 'stoute_funnel' ),
			'not_found_in_trash' => esc_html__( 'No Funnels found in Trash', 'stoute_funnel' ),
			'name'               => esc_html__( 'Funnels', 'stoute_funnel' ),
			'singular_name'      => esc_html__( 'Funnel', 'stoute_funnel' ),
		],
		'public'              => true,
		'exclude_from_search' => true,
		'publicly_queryable'  => true,
		'show_ui'             => true,
		'show_in_nav_menus'   => true,
		'show_in_admin_bar'   => true,
		'show_in_rest'        => true,
		'capability_type'     => 'post',
		'hierarchical'        => false,
		'has_archive'         => true,
		'query_var'           => true,
		'can_export'          => true,
		'rewrite_no_front'    => false,
		'show_in_menu'        => true,
		'menu_position'       => 20,
		'menu_icon'           => 'dashicons-editor-contract',
		'supports' => [
			'title',
			'thumbnail',
			'editor',
			'revisions',
		],
		'taxonomies' => [
			'category',
		],
		'rewrite' => [ 'slug' => 'fun', ]
	];

	register_post_type( 'funnel', $args );
}

/**
 * Add the metabox info for the Funnels CPT
 * Since @1.0.12
**/
 
add_filter( 'rwmb_meta_boxes', 'stoute_funnel_register_meta_boxes' );

function stoute_funnel_register_meta_boxes( $meta_boxes ) {
	$prefix = 'funnel_';

	$meta_boxes[] = [
		'title'      => esc_html__( 'Funnel Settings', 'stoute_funnel' ),
		'id'         => 'funnel_meta',
		'post_types' => 'funnel',
		'context'    => 'normal',
		'autosave'   => true,
		'fields'     => [
			[
				'type' => 'heading',
				'name' => esc_html__( 'Hero Section', 'stoute_funnel' ),
			],
			[
				'type' => 'text',
				'name' => esc_html__( 'Hero Headline', 'stoute_funnel' ),
				'id'   => $prefix . 'hero_headline',
			],
			[
				'type' => 'textarea',
				'name' => esc_html__( 'Hero Subheading', 'stoute_funnel' ),
				'id'   => $prefix . 'hero_subheading',
			],
			[
				'type' => 'text',
				'name' => esc_html__( 'Call to Action Button Text', 'stoute_funnel' ),
				'id'   => $prefix . 'call_to_action_button_text',
				'std'  => 'SEND ME MY FREE GUIDE',
			],
			[
				'type' => 'divider',
			],
			[
				'type' => 'heading',
				'name' => esc_html__( 'Body Section', 'stoute_funnel' ),
			],
			[
				'type' => 'text',
				'name' => esc_html__( 'Body Headline', 'stoute_funnel' ),
				'id'   => $prefix . 'body_headline',
			],
			[
				'type' => 'wysiwyg',
				'name' => esc_html__( 'Body Copy', 'stoute_funnel' ),
				'id'   => $prefix . 'body_copy',
			],
			[
				'type' => 'text',
				'name' => esc_html__( 'Bullet Point #1', 'stoute_funnel' ),
				'id'   => $prefix . 'bullet_point_1',
			],
			[
				'type' => 'text',
				'name' => esc_html__( 'Bullet Point #2', 'stoute_funnel' ),
				'id'   => $prefix . 'bullet_point_2',
			],
			[
				'type' => 'text',
				'name' => esc_html__( 'Bullet Point #3', 'stoute_funnel' ),
				'id'   => $prefix . 'bullet_point_3',
			],
			[
				'type' => 'text',
				'name' => esc_html__( 'Bullet Point #4', 'stoute_funnel' ),
				'id'   => $prefix . 'bullet_point_4',
			],
			[
				'type' => 'text',
				'name' => esc_html__( 'Bullet Point #5', 'stoute_funnel' ),
				'id'   => $prefix . 'bullet_point_5',
			],
			[
				'type' => 'text',
				'name' => esc_html__( 'Bullet Point #6', 'stoute_funnel' ),
				'id'   => $prefix . 'bullet_point_6',
			],
			[
				'type' => 'divider',
			],
			[
				'type' => 'heading',
				'name' => esc_html__( 'Popup Modal Section', 'stoute_funnel' ),
			],
			[
				'type' => 'text',
				'name' => esc_html__( 'Popup Headline', 'stoute_funnel' ),
				'id'   => $prefix . 'popup_headline',
			],
			[
				'type' => 'textarea',
				'name' => esc_html__( 'Popup Sub-text', 'stoute_funnel' ),
				'id'   => $prefix . 'popup_sub-text',
				'rows' => 3,
			],
			[
				'type' => 'text',
				'name' => esc_html__( 'Popup Footer Text', 'stoute_funnel' ),
				'id'   => $prefix . 'popup_footer_text',
				'std'  => 'We hate SPAM and promise to keep your email address safe. Here’s our privacy policy.',
			],
			[
				'type' => 'divider',
			],
			[
				'type' => 'heading',
				'name' => esc_html__( 'Fluent Form Section', 'stoute_funnel' ),
			],
			[
				'type' => 'text',
				'name' => esc_html__( 'Fluent Form Data', 'stoute_funnel' ),
				'id'   => $prefix . 'fluent_form_id',
				'desc' => esc_html__( 'Enter the unique slug for this ebook request.', 'stoute_funnel' ),
			],
		],
	];

	return $meta_boxes;
}

/**
 * Add Fluent Forms Custom Smart Code
 * Since @1.0.11
**/
add_filter('fluentform_editor_shortcodes', function ($smartCodes) {
	$smartCodes[0]['shortcodes']['{stoute_funnels_form_data}'] = 'Funnel Form Data';
	return $smartCodes;
});
add_filter('fluentform_editor_shortcode_callback_stoute_funnels_form_data', function ($value, $form) {
	$dynamicValue = get_post_meta( get_the_ID(), 'funnel_fluent_form_id', true );
	return $dynamicValue;
}, 10, 2);