Heating problems on iPhone 12 Pro

Welcome samet995, 

We understand that your iPhone’s temperature is not what you’d expect it to be. 

Please take a few moments to review the following article Keeping iPhone, iPad, and iPod touch within acceptable operating temperatures It goes over some reasons why your device may be warm, the temperature warning screen and some behaviors that happen if your device is too warm. 

Let us know if any of these conditions seem to ring true for your situation. 

Thanks.