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.):

• Example (with parsoid) (without parsoid) (source)