Using wp_insert_post to create custom posts with ACF image field

ACF has documentation for creating a form on the frontend. I would stick to their suggestions.

I was able to create this by assigning my field group for the form to the custom post type and using a unique template page for the form.

  * Template Name: Form Page Template

<?php acf_form_head(); ?>
<?php get_header(); ?>

        <?php while ( have_posts() ) : the_post(); ?>

            <?php acf_form(array(
                'post_id'       => 'new_post',
                'new_post'      => array(
                    'post_type'     => 'cpt-teste',
                    'post_status'   => 'draft'
                'submit_value'  => 'Submit'
            )); ?>

        <?php endwhile; ?>

<?php get_footer(); ?>