preload.php

<?php 
function fwp_preload_facets() {
?>
<script>
(function($) {
    $(document).on('facetwp-refresh', function() {
        if (! FWP.loaded && '' == FWP.build_query_string()) {
            FWP.facets['product_availability'] = ['americas'];]
            FWP.refresh();
        }
    });
})(jQuery);
</script>
<?php
}
add_action( 'wp_head', 'fwp_preload_facets', 100 );
add_filter( 'facetwp_template_force_load', '__return_true' );