We thought the same 4 years ago when they cheated to get a penalty against australia.
But they went on to win the tournament. :(
They didn't cheat. They acted. It was invented by Diego Maradona in World Cup 1990. Opponent touch you, you just fallover. Let the referee decide. That was because he cheated successfully in World Cup 1986, handball to goal and the referee decided a valid goal in favour of him.
You see, acting is exaggerating the effect a physical contact. Physical contact by itself of course cannot be a foul in a contact sport like football. It's excessive or violent force that constitutes a foul.
The actor commits no foul but tries to maximise the chance of getting a free-kick or penalty by dramatisation. This Italy penalty against NZ just now was such a case, acting not amounting to cheating, so was that against Australia four years ago. What would amount to cheating is no contact but pretending there's contact and fallover. That's known as diving, an yellow-cardable offence if spotted and read as so by the referee.