Thanks https://github.com/patrickhlauke for catching this, the suggestions, and especially the precise WCAG links, very much appreciated.
I’ve lightly edited the suggestions and incorporated them into a pull request:
https://github.com/w3c/csswg-drafts/pull/4694
Patrick, could you review that pull request?
Feel free to suggest additional edits if necessary.
I will wait for your positive review before merging. Thanks!