Im suspicious of True Tone. Every Mac I have purchased sine the introduction of TT has suffered display issues, Be they tinting, uniformity or dimming. I have purchased then returned MacBooks (similarly iPhones) only to find the replacement to have similar display tinting issue. My current Mac has a slight pink hue (where white should be) but I decided it was a keeper based on the one it replaced which had an ugly nicotine stained yellow appearance, washed out colours and noticeably dimmer than my old 2014 Mbp.
Incidentally, we have 3 older MacBook at home. All pre-true tone devices and there is genuinely not one of those displays have tinting or any noticeable uniformity issues, despite their age. Im just not 100% convinced the TT ambient light scanning technology isn't contributing at some degree to the surge in display tint threads we see posted on these forums in recent years