Dmitry

Maybe they can use a framework that makes it easy to press a button to switch between light and dark views. I'd prefer it if every website used dark mode.

For the sake of someone that might be able to take this on, you need to be much more specific about what exactly you want running. You can't just write things like OnePlus. You need too explicitly spec out concrete phone models. I suspect the hardware acquisition costs would exceed the bounty.