I come from a European region, so it’s not nearly as warm here as it is in India. But my battery also rises from 21 degrees to 36 degrees when charging… But it calms down again just as quickly. I don’t find anything unusual about it.
You can set 120 FPS under Display > Refresh rate > High.


The Nothing Launcher requires about 55 MB, Android uses about 12 GB. But that is also pretty normal. However, you can expand your internal memory with an SD card if the phone memory is not enough for you.