$all_meta_for_user = get_user_meta(get_current_user_id()); // It Will Fetch all meta of current user
$countries_obj = new WC_Countries();
$countries = $countries_obj->get_allowed_countries();
woocommerce_form_field('billing_country', array(
                       'type' => 'select',
                       'class' => array('form-control'),
                       'placeholder' => __('Select Country'),
                        'options' => $countries
                        ));
<input type="hidden" name="country1" id="country" class="form-control " value="">
        //Display Selected value in hidden input
        jQuery("#billing_country").change(function () {
            var text = jQuery('select option:selected').text();
            jQuery('#country').val(text);
        });

       //Prefill country select dropdown
       jQuery(document).ready(function () {
            jQuery("#billing_country").val("<?= $all_meta_for_user['billing_country'][0] ?>");
            jQuery("#billing_country").addClass('form-control');
        });