Oh you should try the accessibility feature for that with the little dots on the screen.

Usually it's low FPS (if FPS at all) that causes motion sickness. This comes up in VR discussion a lot. IIRC like 90Hz is considered a minimum.

I get horribly motion sick playing some games like Half-Life 2, Metroid Prime, or the original DOOM. I run my phone at 120Hz and like it. For games, cranking up the FoV tends to help, also disabling effects like viewbobbing, blur, shaking, etc.

I understand this is not fun to experiment with, though. Once I'm motion sick, I tend to be the entire day, only sleeping fixes it, so I'm not usually excited to keep trying to tweak the thing that makes me sick. I tend to dive into settings before playing any game now. I hate when it auto starts the game to appear cinematic.