如果你的目的是只返回一个对象，你可以使用reduce()，但目前，你用的方法有点错误。
1.你需要传递一个初始值给reduce()，如果不是，那么reduce会选择数组的第一个元素作为初始值，并从第二个元素开始迭代。所以当条件为假时，它会返回数组的第一个元素。所以你需要小心使用它。
1.您需要在此处返回item，而不是prev。
以下是.reduce()的解决方案

const data = [{"amount": "600,000", "cover": null, "id": "1", "img": "636e56de36301.1.png", "make": "bmw", "model": "bmw", "name": "APA", "policy": "Motor Insurance", "rate": "6"}, {"amount": "300,000", "cover": null, "id": "2", "img": "63723574a81ce.1.png", "make": "ferrari", "model": "ferrari", "name": "CIC", "policy": "Motor Insurance", "rate": "3"}, {"amount": "450,000", "cover": null, "id": "3", "img": "63723726cb1df.1.png", "make": "audi", "model": "audi", "name": "Mayfair Insurance", "policy": "Motor Insurance", "rate": "4.5"}]

const id = ['3'];
const provider = data.reduce((prv, item) => {
  if(id.includes(item.id)){
    return item 
  }
return prv
}, {});

console.log(provider);

您也可以使用.filter()

const data = [{"amount": "600,000", "cover": null, "id": "1", "img": "636e56de36301.1.png", "make": "bmw", "model": "bmw", "name": "APA", "policy": "Motor Insurance", "rate": "6"}, {"amount": "300,000", "cover": null, "id": "2", "img": "63723574a81ce.1.png", "make": "ferrari", "model": "ferrari", "name": "CIC", "policy": "Motor Insurance", "rate": "3"}, {"amount": "450,000", "cover": null, "id": "3", "img": "63723726cb1df.1.png", "make": "audi", "model": "audi", "name": "Mayfair Insurance", "policy": "Motor Insurance", "rate": "4.5"}]

const id = ['3'];
console.log(data.filter(it => id.includes(it.id)));

To return a single array of data from a given set of data in React Native, you can use the Array.prototype.concat() method to combine the individual arrays into a single array. For example, if you have the following data:

const data = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9]
];

You can use the concat() method to combine the arrays into a single array, like this:

const result = [].concat(...data);

This will return the following array:

[1, 2, 3, 4, 5, 6, 7, 8, 9]

Alternatively, you can use the Array.prototype.flat() method, which was introduced in ECMAScript 2019 and is supported by React Native. This method allows you to flatten an array of arrays into a single array, like this:

const result = data.flat();

This will also return the following array:

[1, 2, 3, 4, 5, 6, 7, 8, 9]

看起来您的代码无法正常工作，因为您错误地使用了Array.reduce（）方法。reduce（）方法用于将数组缩减为单个值，而不是过滤掉数组中的值。
要过滤掉id为3的数据，可以使用Array.filter（）方法。下面是使用filter（）方法时的代码：

const data = [
  {
    "amount": "600,000",
    "cover": null,
    "id": "1",
    "img": "636e56de36301.1.png",
    "make": "bmw",
    "model": "bmw",
    "name": "APA",
    "policy": "Motor Insurance",
    "rate": "6"
  },
  {
    "amount": "300,000",
    "cover": null,
    "id": "2",
    "img": "63723574a81ce.1.png",
    "make": "ferrari",
    "model": "ferrari",
    "name": "CIC",
    "policy": "Motor Insurance",
    "rate": "3"
  },
  {
    "amount": "450,000",
    "cover": null,
    "id": "3",
    "img": "63723726cb1df.1.png",
    "make": "audi",
    "model": "audi",
    "name": "Mayfair Insurance",
    "policy": "Motor Insurance",
    "rate": "4.5"
  }
];

const id = ['3'];

const provider = data.filter(item => id.includes(item.id));
console.log('This is provider', provider);

这将输出以下数据：

[
  {
    "amount": "450,000",
    "cover": null,
    "id": "3",
    "img": "63723726cb1df.1.png",
    "make": "audi",
    "model": "audi",
    "name": "Mayfair Insurance",
    "policy": "Motor Insurance",
    "rate": "4.5"
  }
]