Copy custom terms when duplicatin a woocommerce product

code.php

<?php

// credits: https://github.com/woocommerce/woocommerce/issues/17487#issuecomment-565433819
add_action( 'woocommerce_product_duplicate', function ( $duplicate, $product ) {
	$taxonomies = [ 'taxonomy1', 'taxonomy2' ]; 
	foreach ( $taxonomies as $taxonomy ) {
		$terms = get_the_terms( $product->get_id(), $taxonomy );
		if ( ! is_wp_error( $terms ) ) {
			wp_set_object_terms( $duplicate->get_id(), wp_list_pluck( $terms, 'term_id' ), $taxonomy );
		}
	}
}, 999, 2 );