How Can Mark Product Featured WooCommerce using php code [closed]

Question

I want mark product featured by id using code

i tried this code but not working

// Your Product ID
$product_id   = 43706;
$ecd_product  = new WC_Product( $product_id );
if( $ecd_product->exists() ){
    $ecd_product->set_featured( true );
    $ecd_product->save();
}

and tried this not working

$product_id   = 43706;
$ecd_product  = new WC_Product( $product_id );
if( $ecd_product->exists() ){
    update_post_meta( $ecd_product->id, '_featured', 'yes' );
}