Display ACF checkboxes values

Question

I'm using ACF Pro. I am trying to display the selected checkbox values on Single Product Page. It doesn't display as intended and there are no error messages. I've tried get_field() but still to no avail.

#1

add_action('woocommerce_single_product_summary', ' display_food_checkboxes', 6);
function display_food_checkboxes() { 
    $terms = the_field('available_day');
    echo implode($terms, ','); 
  }

#2

    function display_food_checkboxes() { 
    $terms = get_field('available_day');
    if ( $terms) {
      foreach ( $terms as $term) {
        echo '<p>' . $term . '</p>';
      }
    }
     add_action('woocommerce_single_product_summary', ' display_food_checkboxes', 6);