Mine is absolutley yellower than my XS Max and my wifes X.
That really, really sucks.
I should note that until my Xs, I had actually never needed to exchange a phone, having 6 prior iPhones going as far back as the 3G. But for my Xs, I had to exchange until the 4th one was finally
acceptable. No joke, there are times, well after purchasing and examining and sweating it, where I'll be out at a restaurant or whatever waiting for my food and I pull out my phone and actually notice consciously that the whites are noticeably yellow.
That's insane to be noticing it outright when not comparing and not being in the mindset of looking for it and being well past any mental adjustment period. That said, I went to the store numerous times with #4 when I was still in the return window, and sadly, mine was one of if not the best one I saw of all the Xs/Xs Max display models (probably looked at 12-15), which made me feel better and like I got the best that was on offer with the Xs. But even still, with one of the better ones, it's visibly yellow at times when not even looking for it. Looking at those 11 Pros today, I was just shocked.
That said, at other times I can look at my Xs and understand how someone might really like this soft white, how natural and accurate it probably is in reality. Really, I can see that at times and sometimes it looks nice. But most of the time, I just want it cooler.
I should also note I'm an extreme case - I use a plain white background with nothing on it, and have all my apps in a single row of four folders at the top, so if anyone is conscious and judgmental of white quality, it's me.