Baseline: my two daughters both have iPhone XS-es and they have the same (newest) iOS and the same version of WhatsApp as well... but the Whatsapp app looks different! I have even reset the phones and have installed them again... to the same result, WhatsApp looks different. One has a row: News, Calls, Communities, Chats & Settings, the other one has News, Calls, Communities, Chats & You. Why?
I was upgrading to a 13PM from an X, that was a difference...