Never seen one of these threads after an Apple device Launch.
As with any issue with on your phone, it's best to take it up with Apple. Like Google (I had issues with my Pixel 2) they are really good with providing customer support, and have a good return policy.
On the subject of this thread and posted examples, Wondering how many are playing with their accessibility settings before submitting pictures? Can be used to either dial in, or dial out some yellow or blue. Settings could be used for good or evil intentions. I have pranked my friends with these settings when they leave their phone unlocked (yes I fess up and return to normal) , and I can see people using this to prank Forum members too.
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Thoughts? Max next to 8+. 8+ is noticeably brighter (not sure if its supposed to be or not). Both are at full brightness with true tone turned off.
Check to see if auto brightness is turned off. It is under General > Accessibility > Display accommodations.
You can also ensure that Reduce white point is off, as well as color filters.