Anyone can see your server configuration
A test page left on your server lists the exact software and settings your site runs on. Attackers use this kind of page to choose the attacks that will work on you, so it saves them most of their homework.
GET https://cedar-bakery.example/phpinfo.php
HTTP/2 200
content-type: text/html; charset=UTF-8
<title>PHP 8.0.30 - phpinfo()</title>
Server API: FPM/FastCGI
display_errors: On
DOCUMENT_ROOT: /home/cedarbak/public_html
Found at 10:42:18. We read the page title and five settings, nothing more.
How to fix it: Delete phpinfo.php from the main folder of your site. Nothing on your site uses it.