Get all posts for a custom post type and query them.

WP - get custom post

<?php
  $type = 'custom_post_type';
  $args = array(
    'post_type' => $type,
    'post_status' => 'publish',
    'posts_per_page' => -1,
    'ignore_sticky_posts'=> true
  );
  $my_query = null;
  $my_query = new WP_Query($args);
?>

<?php if( $my_query->have_posts() ):?>
  <?php while ($my_query->have_posts()) : $my_query->the_post(); ?>
  
  <?php endwhile; ?>
<?php
endif;
wp_reset_query();
?>