On Android phones. iPhone doesn’t have this privacy deficiency.
One of the biggest incentives for creating apps is to scrape all kind of data from the users. Look at how many apps require permission to see you contacts. And how many actually need your contacts to function. That's why I'm still a bit surprised that many seem to be surprised by findings like this one here.
That is, again, not require but ask for on iphone. I have zero non-functioning apps on my iphone due to denied access to contacts. Even a chinese bluetooth light controller doesn't dare (while refusing to work on android for the same reason).
You can hate apple/iphone ecosystem all you want, but let's not sneak false claims into how they actually work.