Forminator - set upload field to WP core (non ACF) custom field

<?php
/**
 * Plugin Name: [Forminator] Upload mapping to ACF image field
 * Description: Solves a bug that prevents upload field mapping to ACF image field through post data form
 * Author: Prashant Singh @ WPMUDEV
 * Author URI: https://premium.wpmudev.org
 * License: GPLv2 or later
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

if ( defined( 'WP_CLI' ) && WP_CLI ) {
    return;
}

add_filter( 'forminator_custom_form_submit_errors', 'wpmudev_map_uplods_acf_post_test', 10, 3 );
function wpmudev_map_uplods_acf_post_test( $submit_errors, $form_id, $field_data_array ) {
    $form_ids = array( 16552 ); //Please change form IDs to your form IDs
    if( !in_array( $form_id, $form_ids ) ){
        return $submit_errors;
    }

    $submitted_data = Forminator_CForm_Front_Action::$prepared_data;

    if( isset( $submitted_data['postdata-1'] ) && is_array( $submitted_data['postdata-1'] ) ) {
        if( isset( $submitted_data['postdata-1']['post-custom'] ) && is_array( $submitted_data['postdata-1']['post-custom'] ) ) {
            foreach( $submitted_data['postdata-1']['post-custom'] as $post_key => $post_val ) {
                if( strpos( $post_val['value'], '{upload' ) !== false ) {
                    $field_name = str_replace('{', '', $post_val['value'] );
                    $field_name = str_replace('}', '', $field_name );
                    if ( is_array( $submitted_data[ $field_name ] ) && isset( $submitted_data[ $field_name ]['file'] ) ) {
                        if ( isset( $submitted_data[ $field_name ]['file']['file_url'] ) ) {
                            Forminator_CForm_Front_Action::$prepared_data['postdata-1']['post-custom'][$post_key]['value'] = $submitted_data[ $field_name ]['file']['file_url'];
                        }
                    }
                }
            }
        }
    }

    return $submit_errors;
}

add_action( 'forminator_post_data_field_post_saved', 'wpmudev_update_post_acf_uploads_test', 10, 4 );
function wpmudev_update_post_acf_uploads_test( $post_id, $field, $data, $cls ){
    $submitted_data = Forminator_CForm_Front_Action::$prepared_data;
    $form_ids = array( 16552 ); //Please change form IDs to your form IDs
    if ( !in_array( $submitted_data['form_id'], $form_ids ) ) {
      return;
    }

    if( isset( $submitted_data['postdata-1'] ) && is_array( $submitted_data['postdata-1'] ) ) {
        if( isset( $submitted_data['postdata-1']['post-custom'] ) && is_array( $submitted_data['postdata-1']['post-custom'] ) ) {
            foreach( $submitted_data['postdata-1']['post-custom'] as $post_key => $post_val ) {
                if ( $post_val['key'] == 'View Report' ) { //Please change test_image to your custom field name
                    if ( isset( $post_val['value'] ) ) {
                            update_post_meta( $post_id, $post_val['key'], $post_val['value'] );
                            $mime_type = wp_get_image_mime( $post_val['value'] );
                            if( $mime_type ) {
                                $update_data = array(
                                    'ID' => $attach_id,
                                    'post_mime_type' => $mime_type,
                                );
                                wp_update_post( $update_data );
                            }
                    }
                }
            }
        }
    }
}