the pressure keeps on increasing.

Yes but today's dark mode isn't pure dark it's grey so pixel has to be on, so there is a very less of a difference.

The thing of dark mode saving battery has been a very viral thing. I saw that there are some parts of the screen that turn off in dark mode so that saves batteryyou switched betweem the two modes while in the same percentage and the times changes. ...

My finger was always there and it unlocks quickly.

Fingerprint scanner at the back