My 12 Pro Max has a yellow tint with True Tone on, and blue with it off. I simply can't get a normal looking white on my screen.
The best I've gotten is outdoor in daylight, but indoor especially it's out of whack.
I've looked at store display models and of all 9 I've seen of various 12's, they all had a more yellow screen than the XR I had with me.
It's not that I like a cool blue, it's that I like a neutral white that doesn't seem infected with a yellow (or blue, or green) tint. So far I haven't been able to accomplish that with any tweaks very well.
Apple has told me twice the yellow issue people are complaining about are to spec, and there is no issue. I asked them why they look so much more yellow than all their over devices, and more specifically- a calibrated monitor. All my devices look close to my calibrated monitor... except my... 1200 dollar "Pro" level phone.