Display custom checkout field text instead of an id

I created a custom checkout field for WooCommerce in my functions.php file where users can select an exam date. These dates are loaded from a custom post type. I used the following code:

add_action( 'woocommerce_before_order_notes', 'cinses_add_custom_checkout_field' );
      
    function cinses_add_custom_checkout_field( $checkout ) { 
      if(woo_in_cart(169)) {
        $saved_exam_date_practice = $current_user->exam_date_practice;
      
        $args = array(
          'post_type' => 'practice-data',
          'posts_per_page' => -1,
        );
        $query = new WP_Query($args);

        // Set variable (array)
        $options = array();

        if ( $query->have_posts() ) :
          while ( $query->have_posts() ) : $query->the_post();
            $options[get_the_ID()] = get_field('practice-exam-city') . ' ' . get_field('practice-exam-date');
          endwhile;
          wp_reset_postdata();
        endif;
         
        woocommerce_form_field( 'exam_date_practice', array(        
          'type' => 'select',        
          'label' => __( 'Datum praktijk examen' ),
          'options' => $options,
          'required' => true,        
          'default' => $saved_exam_date_practice,        
        ), $checkout->get_value( 'exam_date_practice' ) ); 
      }
    }

And:

add_action( 'woocommerce_checkout_update_order_meta', 'cinses_save_new_checkout_field' );
      
    function cinses_save_new_checkout_field( $order_id ) { 

        if ( $_POST['exam_date_practice'] ) update_post_meta( $order_id, 'exam_date_practice', esc_attr( $_POST['exam_date_practice'] ) );

    }
      
    add_action( 'woocommerce_admin_order_data_after_billing_address', 'cinses_show_new_checkout_field_order', 10, 1 );
       
    function cinses_show_new_checkout_field_order( $order ) {    
      $order_id = $order->get_id();
      
        if ( get_post_meta( $order_id, 'exam_date_practice', true ) ) echo '<strong>Datum praktijk examen:</strong> ' . get_post_meta( $order_id, 'exam_date_practice', true ) . '
';
      
    }
     
    add_action( 'woocommerce_email_after_order_table', 'cinses_show_new_checkout_field_emails', 20, 4 );
      
    function cinses_show_new_checkout_field_emails( $order, $sent_to_admin, $plain_text, $email ) {
      
        if ( get_post_meta( $order->get_id(), 'exam_date_practice', true ) ) echo '<strong>Datum praktijk examen:</strong> ' . get_post_meta( $order->get_name(), 'exam_date_practice', true ) . '
';
      
    }

Unfortunately this code shows me an ID in the WP admin and confirmation e-mails. How can I display the full date as text?

What I get: “Exam date: 238”
What I want: “Exam date: March 3, 2022”

Thanks for your help in advance!`