How to load assets via JSONP into Phaser

I am trying to load data (including images) via a JSONP feed into Phaser 3.60.0. I know how to load image asset normally as per my GameScene.js code below:

class GameScene extends Phaser.Scene {
  constructor() {
    super({ key: 'GameScene' });
  }

  preload() {
    this.load.image('oranges', './assets/Ambersweet_oranges.jpg');
  }

  create() {
    this.add.image(240, 320, 'oranges')
  }
}

The JSONP feed is located on a different server and is structured like this:

/**/ typeof handleItems === 'function' && handleItems([
{"offerWeek":"kw17","id":"1028377","name":"Bananen","price":"1.79","url":"https://www.rewe.de/angebote/nationale-angebote/#1028377","image":"https://upload.wikimedia.org/wikipedia/commons/5/5d/Pl%C3%A1tanos_de_Canarias.JPG"},
{"offerWeek":"kw17","id":"2670547","name":"Big City Pizza","price":"1.99","url":"https://www.rewe.de/angebote/nationale-angebote/#2670547","image":"https://upload.wikimedia.org/wikipedia/commons/a/a5/Pizza_20.jpg"},
{"offerWeek":"kw17","id":"3663221","name":"Die Thüringer Bratwurst","price":"4.59","url":"https://www.rewe.de/angebote/nationale-angebote/#3663221","image":"https://upload.wikimedia.org/wikipedia/commons/9/91/Bratwurst_on_the_grill.jpg"},
{"offerWeek":"kw17","id":"3919250","name":"Orangen","price":"2.99","url":"https://www.rewe.de/angebote/nationale-angebote/#3919250","image":"https://upload.wikimedia.org/wikipedia/commons/4/43/Ambersweet_oranges.jpg"}]
);

How do I access the product names and images and display them in Phaser? Also how do I wait for the request to finish before create() is called? All advice appreciated!