Nested procedural filter not working

Brave’s adblocker seems to ignore some nested cosmetic filters. For example:

`brave.com##li:has(> span:has-text(Why Brave))`

This works in uBlock Origin, it hides the `<li>` element containing a `<span>` with the text “Why Brave”. In Brave, the element is still visible.

Are these kinds of nested procedural filters supposed to be supported?
