Add an Empty Cart Button in WooCommerce

functions.php

<?php
add_action( 'wp_loaded', 'woocommerce_empty_cart_action', 20 );
function woocommerce_empty_cart_action() {
	if ( isset( $_GET['empty_cart'] ) && 'yes' === esc_html( $_GET['empty_cart'] ) ) {
		WC()->cart->empty_cart();

		$referer  = wp_get_referer() ? esc_url( remove_query_arg( 'empty_cart' ) ) : wc_get_cart_url();
		wp_safe_redirect( $referer );
	}
}