iPhone heating

Hi Everyone…

I’m using a brand new iPhone 13 for last 2 weeks, its getting hot while video calling on Whatsapp and Google Duo. I have done reinstalling the apps and resetting the phone also the ios is 15.2 and the apps are updated too, i have used my iPhone camera for 10 minutes for video recording and its also getting hot more than normal in the volume key sides.. is there anyone else facing the same issue… kindly let me know if any fix is there

Thanks in advance