component_epilog.php

<?

if ($arResult['ARR_NAV']["NavPageNomer"] == 2) {
//     $APPLICATION->SetPageProperty("robots", "noindex, follow");
    Bitrix\Main\Page\Asset::getInstance()->addString("<link rel='prev' href='https://{$_SERVER['SERVER_NAME']}{$arResult['LIST_PAGE_URL']}'>");
}
elseif ($arResult['ARR_NAV']["NavPageNomer"] > 2) {
//     $APPLICATION->SetPageProperty("robots", "noindex, follow");
    $prevPage = $arResult['ARR_NAV']["NavPageNomer"] - 1;
    Bitrix\Main\Page\Asset::getInstance()->addString("<link rel='prev' href='https://{$_SERVER['SERVER_NAME']}{$arResult['LIST_PAGE_URL']}?PAGEN_{$arResult['ARR_NAV']["NavNum"]}={$prevPage}'>");
}
if ($arResult['ARR_NAV']["NavPageNomer"] < $arResult['ARR_NAV']["NavPageCount"]) {
    $nexPage = $arResult['ARR_NAV']["NavPageNomer"] + 1;
    Bitrix\Main\Page\Asset::getInstance()->addString("<link rel='next' href='https://{$_SERVER['SERVER_NAME']}{$arResult['LIST_PAGE_URL']}?PAGEN_{$arResult['ARR_NAV']["NavNum"]}={$nexPage}'>");
}

Bitrix\Main\Page\Asset::getInstance()->addString("<link rel='canonical' href='https://{$_SERVER['SERVER_NAME']}{$arResult['LIST_PAGE_URL']}'/>");

result_modifier.php

<?
$arNavResult = array();
$arNavResult['NavNum'] = $arResult['NAV_RESULT']->NavNum;
$arNavResult['NavPageNomer'] = $arResult['NAV_RESULT']->NavPageNomer;
$arNavResult['NavPageCount'] = $arResult['NAV_RESULT']->NavPageCount;
$arResult['ARR_NAV'] = $arNavResult;
$this->__component->SetResultCacheKeys(array('ARR_NAV'));