The phone is still in it's learning phase and indexing the files and apps you've downloaded, and as it's new you'll be using it more intensively to get to know the functions and features @mcfckippax
All this will lead to heat build up.
The phone is only really overheating if you see a warning pop up message on tbe phone saying it is.
If your using a case then consider removing it.
Also look at > https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ You may need to hook up to a Computer or insert your earphones to enter into recovery mode.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help.