How to test in app purchase in ios smiulator?

Ionic Native
1

I’m creating an app it has a subscription option. I used stripe for it but the Apple team won’t allow it. So I’m trying to integrate the in-app purchase option.
I need to fetch all the products from the app store that I have created. then show it to the user, they can buy it.
I got the plugin for it named in-app purchase in ionic documentation. I cant buy the product via the simulator. It says " Cannot connect to iTunes Store".

Problem #1 cant fetch all products dynamically
Problem #2 cant Test it in the simulator

 this.iap.getProducts(['first'])
    .then((products) => {
    console.log(products);
    this.products = products;
    //  [{ productId: 'com.yourapp.prod1', 'title': '...', description: '...', price: '...' }, ...]
    })
    .catch((err) => {
    console.log(err);
    });

buyProduct(productId){
  this.iap
  .buy(productId)
  .then((data)=> {
    console.log(data);
    // {
    //   transactionId: ...
    //   receipt: ...
    //   signature: ...
    // }
  })
  .catch((err)=> {
    console.log(err);
  });
}

How to test it in the simulator?