How to store ACF field value in WooCommerce order details?

Question

WooCommerce

There is a task: on the checkout page there are delivery methods, if a specific delivery method is selected (only 1), then a drop-down list should appear with the delivery time. This field is implemented using the ACF Repeater plugin and the field type is Text. What time the user has chosen, respectively, should be displayed in the order details in the Wookomers admin panel.

Based on the theme code that I got, I wrote the following:

1. In the woocommerce/checkout/form-shipping.php file, the following code:

<div id="delivery_times" class="form-group d-none">
   <label class="text-bold" for="select_time">Delivery time: </label>
      <select id="select_time" class="form-control mb-1">
         <option value="" selected>Select time</option>
         <?php
            $delivery_times = get_field('delivery_times', 'options');
            $count = 0;
            foreach ($delivery_times as $delivery_time):
              echo '<option value="'.$delivery_time['range_time'].'" data-pickup="'.$count.'">'.$delivery_time['range_time'].'</option>';
              $count++;
            endforeach;
          ?>
       </select>
</div>

2. There is a common theme-checkout.js file, I added the following to it:

$("#shipping_speed").change(function(){
    var delivery_time = $(this).children("option:selected").data("type");

    if(delivery_time == "tomorrow"){
       $("#delivery_times").removeClass("d-none");
    }else{
       $("#delivery_times").addClass("d-none");
       $("#select_time option[value='']").prop('selected',true);
    }
});

And now I need to save the selected data and display them somehow in the order details for the administrator, but I have not found the implementation of something similar in my theme. Can you please tell me how can I transfer this data from the ACF field to the order details?