Обычные люди требуют документацию... Хватит это терпеть.

  $APPLICATION->IncludeComponent(
   "bitrix:ui.sidepanel.wrapper",
   "",
   array(
      "POPUP_COMPONENT_NAME" => "arnly:dm.main.processes",
      "POPUP_COMPONENT_TEMPLATE_NAME" => "bp".$_REQUEST['BP_ID'],
      "POPUP_COMPONENT_PARAMS" => array(
         'HL_ID' => $_REQUEST['HL_ID'],
         'ID' => $_REQUEST['ID'],
         'BP_ID' => $_REQUEST['BP_ID'],
      )
   )
);
  

  \Bitrix\UI\Toolbar\Facade\Toolbar::addFilter([
   'FILTER_ID' => $arResult['FILTER']['ID'],
   'GRID_ID' => $arResult['GRID_ID'],
   'FILTER' => $arResult['FILTER']['FIELDS'],
   'FILTER_ROWS' => $arResult['FILTER']['ROWS'],
   'FILTER_PRESETS' => $arResult['FILTER']['PRESETS'],
   'ENABLE_LIVE_SEARCH' => false,
   'ENABLE_LABEL' => true,
   'RESET_TO_DEFAULT_MODE' => true,
   'VALUE_REQUIRED' => true,
]);

\Bitrix\UI\Toolbar\Facade\Toolbar::addButton(
   (new \Bitrix\UI\Buttons\Button([]))
      ->setText(htmlspecialcharsbx(Loc::getMessage('ARNLY_DM_START_BP_ELEMENT')))
      ->setDataRole('dm-start-bp-element')
      ->setColor(Bitrix\UI\Buttons\Color::PRIMARY)
      ->setDropdown(true)
);