Just some short info about my phone experience so far:
Used and using Google Pixel 1 XL since it became available, without any problems.
Just got a Samsung S10, which makes me dead after like 1-2 hours of use.
I was trying an iPhone 11 from one of my colleges; i'm not completely sure, because it was just a 10 mins test, but i found it not really comfortable.
Generally i'm not completely sure what makes me sick, but i have the feeling it is not related to pwm and blue light and things like that (as i already detailed in my story before), but better something like how the screen is presented, e.g. i can have problems also from an empty dark screen, or PC games, etc. The only thing i know, is that the focusing on the screen/content is somehow different/uncomfortable, for example looking around in a shop with TVs, monitors turned on with some content playing is a no go for me; instant dizziness. Sadly there is even less products manufactured in the let's say "traditional" way, which causing no trouble.