Here is the solution if you want to display the custom message above the shipping options in the cart totals section on the WooCommerce cart page.
function ts_display_above_shipping_options() {
?>
<div class="custom-content-above-shipping">
<p>Planning your order? Take note of the available shipping options:</p>
</div>
<?php
}
add_action('woocommerce_before_shipping_calculator', 'ts_display_above_shipping_options');
Output
The below output shows that the custom message has been displayed above the shipping options on the WooCommerce cart page.
Additionally, you can also set different messages below each shipping method such as display delivery day range based on shipping country in WooCommerce cart.
