add_filter( 'frm_csv_columns', 'move_id_column', 10, 2 );
function move_id_column( $headings, $form_id ) {
  if ( $headings['id'] ) { 
    $temp_id = $headings["id"];
    unset($headings["id"]);
    $headings = array_merge(["id" => $temp_id], $headings);
  }
  return $headings;
}