Insert object into dynamic key nested array [duplicate]

Desired result: Insert an object into each dynamicItem and have the full obj object.

const obj = {
  item1: {},
  item2: {
    dynamicItem1: [{ id: 'one' }, ], // add another prop here {type: 'added'}
    dynamicItem2: [{ id: 'one' }, ] // add another prop here {type: 'added'}
  },
}

My attempts: I managed to insert the object, but i can't think how to rebuild the full object and it also feels like i'm doing it wrong already.

const result = Object.keys(obj.item2).map(key => {
    return obj.item2[key].map(item => ({ ...item, type: 'added' }))
})