However, this article has a lot of "Pepsi Logo" vibes (https://www.scribd.com/document/541500744/Pepsi-Arnell-02110...). I never confirmed if this was a hoax, but it was made into many news websites at the time.
Many design justifications they put on the page don't make much sense: yes, a big send button increases the metric of people finding the button, but it also takes space from the screen, and your daily phone UI is not a kiosk. "New users" become "experienced users", so the big button quickly becomes annoying. Even the M3 documentation site is terrible on mobile: the tab switch at the headers of some docs is so big that just two tabs don't fit into the screen.
By contrast, Apple, which is often praised for its product aesthetics, never makes marketing content like this about its design language. It may present creating emojis as a huge feature or inflate some of its claims a bit, but in general, they let the product do the talking.