DomCrawler to get dateTime -attribute from <time>

Question

The HTML

<time dateTime="2023-12-28T20:03:13.359+01:00">28 December 2023</time>

This works

$meta_description = $crawler->filter('meta[name="description"]')>attr('content');

This doesn't work

$published_at = $crawler->filter('time')->attr('dateTime');

This works (gives 28 December 2023)

$published_at = $crawler->filter('time')->text();