Place ACF product gallery onto single products

add_action( 'woocommerce_after_single_product_summary', function() {

	if( ! function_exists( 'get_field' ) ) {
		return;
	}

	$product_gallery = get_field( 'product_gallery' );

	if( ! $product_gallery ) {
		return;
	}

	$items = [];
	foreach( $product_gallery as $item ) {
		$items[] = sprintf(
			'<li class="product"><a href="%s">%s</a></li>',
			wp_get_attachment_image_url( $item['ID'], 'full' ),
			wp_get_attachment_image( $item['ID'], 'woocommerce_thumbnail' )
		);
	}

	printf(
		'
			<section class="up-sells upsells products">
				<h2>View on tablesetting…</h2>
				<ul class="products columns-4">%s</ul>
			</section>
		', implode( '', $items )
	);

} );