add_action( 'wp_head', function() {
    ?>
    <script>
        (function($) {
            document.addEventListener('facetwp-loaded', function() {
                $.each(FWP.settings.num_choices, function(key, val) {

                    // assuming each facet is wrapped within a "facet-wrap" container element
                    // this may need to change depending on your setup, for example:
                    // change ".facet-wrap" to ".widget" if using WP text widgets

                    var $facet = $('.facetwp-facet-' + key);
                    var $wrap = $facet.closest('.facet-wrap');
                    var $flyout = $facet.closest('.flyout-row');
                    if ($wrap.length || $flyout.length) {
                        var $which = $wrap.length ? $wrap : $flyout;
                        (0 === val) ? $which.hide() : $which.show();
                    }
                });
            });
        })(jQuery);
    </script>
    <?php
}, 100 );