let arr = [
    {
        name: 'One',
        id: 1,
        value: 221,
        list: [{id: 444}]
    },
    {
        name: 'Two',
        id: 2,
        value: 233,
        list: [{id: 555}]
    },
]

arr = arr.map((item) => {
  item.isUse = item.list?.length === 0 ? false : true;
  delete item.list;
  
  return item;
});

console.log(arr);