Category : Custom Post Type

// into pages or template files
<?php 
$args = array(
  'post_type' => 'product', // Name of the CPT
  'order' => 'DESC', 
  'orderby' => 'meta_value', // Order with a meta field value
  'meta_key' => 'note', // Name of the ACF field
  'posts_per_page' => 5 // 
);
$query = new WP_Query( $args );
// ... Start of the loop
?>

// into pages or template files
<?php 
$args = array(
  'post_type' => 'name-of-the-custom_post_type', // Name of the CPT
  'posts_per_page' => 3, // Number of post to display
  'order' => 'DESC', // ASC ou DESC 
  'orderby' => 'date', // title, date, comment_count...
);

$my_query = new WP_Query( $args );
if( $my_query->have_posts() ) : while( $my_query->have_posts() ) : $my_query->the_post();
  the_title();
  the_content();
  // ...
endwhile;
endif;

wp_reset_postdata(); // important!
?>

// into functions.php or a dedicated plugin file
<?php 
function sp_tax() {
  register_taxonomy(
    'product-type',
    'product',
    array(
      'labels' => array(
        'name' => 'Product type',
        'new_item_name' => 'New product name',
        'parent_item' => 'Parent type product',
      ),
      'show_ui' => true,
      'show_in_rest' => true,
      'show_tagcloud' => false,
      'hierarchical' => true
    )
  );
}

add_action( 'init', 'sp_tax', 0 );
?>

// functions.php or a dedicated plugin file
function sp_cpt() {
  // Set UI labels for the Custom Post Type
  $labels = array(
    'name' => 'products',
    'all_items' => 'All products',  // Visible into submenu
    'singular_name' => 'Product',
    'add_new_item' => 'Add a product',
    'edit_item' => 'Modify product',
    'menu_name' => 'Products' // Visible into submenu
    ); 
  // Set other options for Custom Post Type 
  $args = array(
    'labels' => $labels,
    'public' => true,
    'show_in_rest' => true, // Mandatory to be used with Gutenberg editor
    'has_archive' => true,
    'supports' => array( 
      'title', 
      'editor', // Mandatory to be used with Gutenberg editor
      'thumbnail' 
    ),
    'menu_position' => 5, 
    'menu_icon' => 'dashicons-palmtree',
  );
  // Registering the Custom Post Type
  register_post_type( 'products', $args );
}

add_action( 'init', 'sp_cpt', 0 );