Fuzzy search count running very slow

MongoDB Atlas
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1 
const totalcount = await model.aggregate([                      
                        {
                            $search: {
                                index: 'keywordsearch',
                                text: {
                                    path: 'Keywords',
                                    query: req.query.searchdes,
                                    fuzzy: {
                                        maxEdits: 2,
                                        maxExpansions: 20,
                                    },
                                },
                            },
                        },
                        {
                            $count: 'total_count',
                        },
                    ])

This query running very slow and takes almost 1-2 minutes when ran over a collection of 2 Million data. Keywords field is a comma seperated string values in database.

Is there any way to optimize this query to get faster count results?

3

But $match is always placed after $search stage otherwise it throws error. I have also tried using $match later which had no impact on performace.