I got my Omen PC today but it is in normal games e.g. Fortnite with 120 fpps already at 80C on the CPU?

As I said above, I have an Intel i710700 graphics card 3060 ti

when I'm not even playing it is already at 50 degrees with the CPU. Send back?

The temperatures are completely normal

Really think that's a lot for CPU utilization 25%

Then you have wrong expectations. It is not easy to get below 50 ° C with air coolers, 45! C can sometimes still be achieved, but not with the cheap coolers that HP usually uses. For them 50 ° C is pretty good.