rename-add-cart-specific-product.php

add_filter( 'woocommerce_product_add_to_cart_text', 'custom_loop_add_to_cart_button', 20, 2 ); 
add_filter( 'woocommerce_product_single_add_to_cart_text', 'custom_loop_add_to_cart_button', 20, 2 );
function custom_loop_add_to_cart_button( $button_text, $product ) {
    // HERE define your specific product IDs in this array
    $specific_ids = array(10357339); // product id
    
    if( in_array($product->get_id(), $specific_ids) ) {
        $button_text = __("Subscribe now!", "woocommerce");
    }

    return $button_text;
}