Code Snippet 1 - https://solusipress.com/menghilangkan-tombol-add-to-cart-pada-woocommerce/

snippet-1.php

<?php
add_filter('woocommerce_is_purchasable', 'woocommerce_restaurant_purchasable', 10, 2 );
function woocommerce_restaurant_purchasable($is_purchasable, $product) {	
	return (!$product->managing_stock() ? false : $is_purchasable);
}