> Theoretically, devices like the iPhone have lower power consumption than that and loads of performance features like recording 4k 120fps video.

iPhones use cutting edge (expensive) manufacturing processes for their chips.

They also have batteries inside to cover the power demands while doing intense work like recording 4K 120fps video.

I don't understand what point you're trying to make. The Raspberry Pi is not in the same class of device as an iPhone.