The new content highlighter only works as expected on web client

The new content highlighter only works as expected on web client

Selecting, copying and pasting does not yet fully work on the desktop client (Mac). You can copy and paste headings, paragraphs and images, but not tables, files, bookmarks etc.
The May 26 announcement seems to apply only to the web client, but it does not mention this fact. Does this perhaps apply to all news that appear in the web client?