Worrying about whether or not somebody has an Android is going to be very bad for your mental health given that something like 42% of the US cell phone market is Android. Is it possible that you are living in a bubble of people that are significantly more committed to Apple products than the median person?
I don't live in such a bubble, and whether or not somebody has Apple or Android is not something I have ever heard an adult bring up as a serious thing. The most I've ever seen is as an observation about why some sort of thing in a group chat didn't work, but then everyone moves on with their day and the chat continues with the types of text and media that do work.
It was only important for the home-buying process, and somehow every single person involved happened to have an iPhone. Presumably if they were all on Android, they'd prefer WhatsApp, and that'd be ok too.
Outside of that exceptional case, I don't think much about what phone other people have, but I personally want the phone that won't break group chats I get added to. Only about 75% of my friends use iPhones, but there's still a decent chance a group happens to be 100%.
I don't live in such a bubble, and whether or not somebody has Apple or Android is not something I have ever heard an adult bring up as a serious thing. The most I've ever seen is as an observation about why some sort of thing in a group chat didn't work, but then everyone moves on with their day and the chat continues with the types of text and media that do work.