screen warm/colors

hello

recently I get an iPhone 13 pro max, I noticed that the screen colors tends to be yellow almost all the time, I tried the true tone, dark mode, and other related options of screen and its warm, all in vein, I contacted apple support who made a diagnose test and replied that all is fine concerning hard/software. in fact I did compare my phone to another new one and noticed the difference in screen in both phones. what can I do? I am not happy with yellowish approach of my screen, I want it to be normal i.e. tends to be relaxing white.

something else, whenever I make a whatsapp or FB video call, the camera/screen automatically become darker, while when I open the camera app alone, all is fine, what should I do here to have all normal ?

hope I explained my problem in a good way.