$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');
});