new Iphone 12 overheating

I just bought an iPhone 12 128GB on 2023. and dowloaded ocean **** 2 with I. think is demanding game but no as much as others. but the iPhone get uncomfortably hot in the first few seconds that If bothers my hands when I play and is without a cover and unplug. is it normal or It just came damage? I haven't got the overheating message tho.

here might be a better place to ask

new Iphone 12 overheating
 
 
Q