Astra WooCommerce Search

add_filter( 'astra_get_search_form', 'astra_search_woocommerce_only' );
function astra_search_woocommerce_only( $search_form ) {
    $search_form = str_replace( '-1"/>', '-1"/><input type="hidden" name="post_type" value="product"/>', $search_form );
    return $search_form;
}