I have never had problems with phones. Recently I bougth used Samsung Note 9. My eyes started to hurt. I never thought to look for PWM on phones. But it seems that the recent trend to use OLED has done that. Even Sony, which I had many phones.
I really like Iode OS. The privacy, no bloat, updates, battery charging… So, please add support for sensitive people like me, for a phone with IPS screen, no PWM. And personally, I want it to have headphone jack and SD card slot too. For example Oneplus Nord N30 is I think like that.
I am using now application OLED saver, which I think it helps. But it is not a good solution.