ZEN_RSS

<?php
require($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/main/include/prolog_before.php");

header("Content-Type: application/rss+xml; charset=utf-8");

use Bitrix\Main\Loader;
Loader::includeModule("iblock");

$iblockId = 38; // ← ID инфоблока "Статьи"

echo '<?xml version="1.0" encoding="UTF-8"?>';
?>
<rss version="2.0"
     xmlns:content="http://purl.org/rss/1.0/modules/content/;&gt;
<channel>
  <title>Статьи</title>
  <link>https://<?=$_SERVER["SERVER_NAME"]?>/articles/</link>
  <description>RSS для Яндекс Дзена</description>
  <language>ru</language>

<?php
$res = CIBlockElement::GetList(
  ["ACTIVE_FROM" => "DESC"],
  ["IBLOCK_ID" => $iblockId, "ACTIVE" => "Y"],
  false,
  ["nTopCount" => 20],
  ["ID", "NAME", "DETAIL_TEXT", "DETAIL_PAGE_URL", "ACTIVE_FROM"]
);

while ($item = $res->GetNext()):
?>
  <item>
    <title><![CDATA[<?=$item["NAME"]?>]]></title>
    <link><?="https://".$_SERVER["SERVER_NAME"].$item["DETAIL_PAGE_URL"]?></link>
    <guid><?="https://".$_SERVER["SERVER_NAME"].$item["DETAIL_PAGE_URL"]?></guid>
    <pubDate><?=date(DATE_RSS, strtotime($item["ACTIVE_FROM"]))?></pubDate>

    <content:encoded><![CDATA[
      <?=$item["DETAIL_TEXT"]?>
    ]]></content:encoded>
  </item>
<?php endwhile; ?>

</channel>
</rss>