My understanding is that's not the case, that the 14 day limit (which I haven't heard about, actually) is for only WFH full time over an extended period.
The article is poorly researched and is not explaining the 14 day thing correctly. I'm sure that the actual email will be leaked at some point but since it is listed as internal only, just know that it isn't what is described in the article.
That’s the real news for me. After the pandemic is over Google will go back to a full-onsite team.