free-shipping-notice-on-cart.php

<?php
add_action( 'woocommerce_before_cart', 'wc_add_notice_free_shipping' );

function wc_add_notice_free_shipping() {
           
           $free_shipping_settings = get_option('woocommerce_free_shipping_1_settings');
           $amount_for_free_shipping = $free_shipping_settings['min_amount'];

           $cart = WC()->cart->subtotal;
           $remaining = $amount_for_free_shipping - $cart;

           if( $amount_for_free_shipping > $cart ){
               $notice = sprintf( "Add %s worth more products to get free shipping", wc_price($remaining));
               wc_print_notice( $notice , 'notice' );
           }
            
}

?>

Where should put free-shipping-notice-on-cart.php file in server? Shoul I put inside theme wocommerce folder?

@gamzegenccelik in your functions.php file 😉