Iphone 15 pro heating too much & battery drain.

I’m using my new device 15 pro (256gb) since last 3 days now. The very first day as it was set up I ignored excess heating. But from last 2 days it heats up too much. Even 5 minutes of video call and you can’t touch the top left back side of the phone. Even the sides (action & volume buttons) get very hot. The battery too drains quickly as soon as we are on video call or watching videos on Instagram.

I rarely faced this issue with my older phone (XR).