Leaving our puppy alone for the first time today

Today is Mother's Day here (UK), and after two tantrums and constant bickering from the human puppies, we are finally going out for lunch.

We will be leaving the furry puppy (ETA: 4mo) home for the first time.

We've tired her out with active games, set up a safe space (kitchen) with her bed, some toys, her food and water dishes, and we will leave the radio playing for company.

What carnage should I expect when we get home in 4 hours time?