Related Question: Is it possible for AM-OLED to be PWM free? ( Apart from setting it at maximum brightness ). Or would we have to stick to this until MicroLED comes.... which is still years away.
Edit: I know W-OLED used by LG does not have PWM problem, but that is not for mobile uses.
In summary they are saying that low frequency (240Hz) PWM is used for amoled because it decreases sub-pixel wear, it prevents color distortion, it's cheaper. So it looks like this won't change. I got an amoled phone and was surprised that the experience was worse than LCD (for me - it seems to depend a lot on the individual). Didn't even know that PWM was used until I started googling eystrain and amoled. Anyway, I sent the phone back.
Check notebookcheck's reviews to find AMOLED phones that eiter don't use PWM (I think it's only about 2 of them) or only use it above a certain brightness level. For example, the Axon 7 Mini. It seems those displays started to show up at around 2016.
A small 60 Hz flicker will remain though, similar to as seen on OLED TVs.
Edit: I know W-OLED used by LG does not have PWM problem, but that is not for mobile uses.