ts def of updateOne&findOneAndUpdate returns FlattenMap instead of UpdateWriteOpResult, when lean() is used

[simllll]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Mongoose version

7.1.0

Node.js version

16.20

MongoDB server version

5.x

Typescript version (if applicable)

4.9.5

Description

I tried upgrading to mongoose 7.x, but now I'm stuck with some typescript issues.

somehow updateOne returns a FlattenMap and not the ResultType defined in updateOne:

I would expect a UpdateWriteOpResult here.

Steps to Reproduce

my UserModel is defined as

const userSchema = new Schema({...});

export interface IDBUser { .. };

const DBUserModel: Model<IDBUser> = model<IDBUser>('User', userSchema);

just run updateOne on it and check the return type.

Expected Behavior

typescript should correctly return the UpdateWriteOpResult

[simllll]

Okay looking close at this, this is only happening on two places in this file, but works on 23 more.
And looking even closer: it turns out, there as a .lean() in the query. as this does not return any collection results, this is of course not required at this place. seems more correct without, but would be great to actually don't even allow .lean() on .updateOne query?

td;dr:
Solution: remove .lean()

[simllll]

Okay, problem 1 solved, another one popped up, now .lean() cannot be removed because I'm using findOneAndUpdate()

it says again FlattenMap is returned, which does not have a lastErrorObject and value, it should correctly return ModifyResult instead.
Notice: I'm specifying rawResult: true to get this type of result. Am I missing some breaking changes regarding this property?

Update 1: Thinking about rawResult.. ppbl this infer that no mongoose magic is happen anyway, right? Removing lean() would solve my problem again..