**Steps to replicate the issue** (include links if applicable):
* Make sure ParserMigration is installed.
* Write down and save CSS stylesheet in `#css:` parser function on any page.
* View parsoid-rendered version of that page by appending `useparsoid=1` param or set opt-in on `Use the new Parsoid wikitext parser` option from Editing tab of `Special:Preferences`
**What happens?**:
Stylesheets I set by `#css:` parser functions are not applied on the page.
**What should have happened instead?**:
Stylesheets set by `#css:` parser functions are applied to the page.
**Software version** (on `Special:Version` page; skip for WMF-hosted wikis like Wikipedia):
* CSS 3.5.0 (0d9a1ae)
* MediaWiki 1.43.0
* PHP 8.1.31
* ParserMigration 2.0.0 (857cdca)
* Parsoid 0.20.1
**Other information** (browser name/version, screenshots, etc.):