They did design it but in the whole post he was making fun of it. This Gen-Z mode that he designed is not made out of compassion for the users but rather as a parody of Gen-Z aesthetic.

I had fun reading it but I feel it is a bad business move to attack your user base, and I assume that they have more users around the 18yo of the spectrum than 75.

Would he also make fun of a boomer mode, with large buttons everywhere and "get me out of the app and just call person" feature?