He has been surrounded by elite players that make clutch plays, and elite coaches, on both sides of the ball. He also did not play especially well in this game. And that's fine. QBs are allowed to play below their highest standard and still win games against great opponents. At least some QBs are.
Seriously if anyone's takeaway from this game is "Mahomes just finds a way to get it done" I have about zero respect for your football opinion. Please use your eyes.
Disclaimer: None of this is meant to take away from the greatness that is Mahomes. He is one of the best QBs I've ever watched.