Update multiple documents by id set. Mongoose

in updateMany function no need of { multi: true }

db.collectionName.updateMany(
    {
        _id:
            {
                $in:
                    [
                        ObjectId("your object id"),
                        ObjectId("your object id")

                    ]
            }
    },
    {
        $inc: { quantity: 100 }

    })

I want to add one more point, you can use $in to fetch multiple document

 db.collectionName.find(
        {
            _id:
                {
                    $in:
                        [
                            ObjectId("your object id"),
                            ObjectId("your object id")

                        ]
                }
        })

Most probably yes. And it is called using $in operator in mongodb query for update.

db.Element.update(
   { _id: { $in: ['id1', 'id2', 'id3'] } },
   { $set: { visibility : yourvisibility } },
   {multi: true}
)

All you need is to find how to implement $in in mongoose.