php - Set image thumbnail for order a "Free Sample" on cart page in WooCommerce

$thumbnail = apply_filters( 'woocommerce_cart_item_thumbnail', $_product->get_image(), $cart_item, $cart_item_key );
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So to replace the product image from the "Free Sample" product on cart page use

// 3.1 Replace "Free Sample" with product image (CART & CHECKOUT)
function filter_woocommerce_cart_item_thumbnail( $product_image, $cart_item, $cart_item_key ) {
    // Get name
    $item_name = $cart_item['data']->get_name();
        
    if ( $item_name == "Free Sample" ) {
        // Get product
        $product = wc_get_product( $cart_item["free_sample"] );

        // Get image
        $new_product_image = $product->get_image();
        
        // Add new image
        $product_image = $new_product_image;
    }
    
    return $product_image;
}
add_filter( 'woocommerce_cart_item_thumbnail', 'filter_woocommerce_cart_item_thumbnail', 10, 3 );
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So replace

// 4. Add "Free Sample" product name to order meta
// Note: this will show on thank you page, emails and orders
  
add_action( 'woocommerce_add_order_item_meta', 'bbloomer_save_posted_field_into_order', 9999, 2 );
  
function bbloomer_save_posted_field_into_order( $itemID, $values ) {
    if ( ! empty( $values['free_sample'] ) ) {
      $product = wc_get_product( $values['free_sample'] );
      $product_name = $product->get_name();
      wc_add_order_item_meta( $itemID, 'Free sample for', $product_name );
    }
}
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With

// 4. Add "Free Sample" product name to order meta
// Note: this will show on thank you page, emails and orders
function action_woocommerce_checkout_create_order_line_item( $item, $cart_item_key, $values, $order ) { 
    if ( ! empty( $values['free_sample'] ) ) {      
        $product = wc_get_product( $values['free_sample'] );
        $product_name = $product->get_name();
            
        $item->update_meta_data( __( 'Free sample for', 'woocommerce' ), $product_name );
    }
}
add_action('woocommerce_checkout_create_order_line_item', 'action_woocommerce_checkout_create_order_line_item', 10, 4 );
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