I don't know how it works at Google, but unless they're giving away Pixel phones for free to their employees (or at a very, very strong discount), they have no business forcing their employees to use their products.
Here is how a job works: worker works, company gives money. Workers do whatever the fuck they want with the money they earn.
You're typically issued a corporate phone, it's the only phone that can open work email. You have a choice between an Android (something like a Pixel and a Samsung) and an iPhone, with some companies incentivising Androids with things like a faster upgrade cycle or more premium trims. The culture is split between having just the one free corporate phone and having two phones - one personal, one corporate.
There are lots of examples of Android team employees who are proud of using only Apple phones.
Check the "socially inept tech roast show" - where people from those teams demonstrate their ignorance and hatered towards own products and users.
Since they dont use them, they dont see nor care about bugs.
Meanwhile if you work for a cola company and they catch you drinking competing product you will get fired (your contract bans you fron that). Same for many other products.
I understand using an Apple phone to learn what it does / its featurs, but those Android employees dont use Android at all. And it shows
If you are hired by a manufacturer of say cola, you cannot drink the competition cola.
Those in google laugh when asked to show their phones - and then show iphones. In any other business they would be terminated.