CKEditor 5 + Full HTML prevents the child combinator CSS selector to be used in <style>

Problem/Motivation

The site administrators are using the CKEditor 5 FULL HTML text format to provide custom stylings using tags with the source editing. But when the css is used with the '>' syntax, ex:

<style type="text/css">
.sections > h2 {
</style>

the > symbol (the child combinator selector: https://developer.mozilla.org/en-US/docs/Web/CSS/Child_combinator) gets replaced into html entities and shown as

<style type="text/css">
.sections &gt; h2 {
</style>

This is checked with the latest 10.1.5 version. We checked by unchecking the filter "Correct faulty and chopped off HTML" filter but still able to reproduce this issue.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet