Wrong result type for updateOne

[SimonVillage]

Do you want to request a feature or report a bug?
bug

What is the current behavior?
I am using updateOne with upsert: true to update or create a document. I need to check if a document was created (upserted) or updated. I tried using res.nModified; but it returns 0 if the document was upserted OR not updated.

If the current behavior is a bug, please provide the steps to reproduce.
Referencing: https://masteringjs.io/tutorials/mongoose/upsert

const result = await MyModel.updateOne(
  { status: "completed" },
  { foo: "bar" },
  { upsert: true }
);

result will be:

{
  n: 1,
  nModified: 0,
  upserted: [ { index: 0, _id: 605455642dfbeba567704211 } ],
  ...
}

However result.upserted does not exist in types:
Property 'upserted' does not exist on type '{ ok: number; n: number; nModified: number; }'.

https://github.com/Automattic/mongoose/blob/master/index.d.ts#L857 is using https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/mongodb/index.d.ts#L2772 which has the following definition:

/** @see https://mongodb.github.io/node-mongodb-native/3.1/api/Collection.html#~updateWriteOpResult */
export interface UpdateWriteOpResult {
    result: { ok: number; n: number; nModified: number };
    connection: any;
    matchedCount: number;
    modifiedCount: number;
    upsertedCount: number;
    upsertedId: { _id: ObjectId };
}

What is the expected behavior?
I need to know if a document was updated or upserted. If nModified == 0 it could be that the document got upserted or not updated at all as it didn't had any changes.

I could use fineOneAndUpdate however, updatedExisting is always true even if the data did not change for an update.

What are the versions of Node.js, Mongoose and MongoDB you are using? Note that "latest" is not a version.
mongoose: 5.12.1
mongodb: 3.6.5
node: v14.15.4