[{"_id":{"$oid":"61f6322cd3e3484d97a25e7c"},"dayWiseClicks":[{"date":"01/30/2022","dailyClicks":1,"_id":{"$oid":"61f66ff95fadc3e9f01b0d34"}},{"date":"01/30/2022","dailyClicks":1,"_id":{"$oid":"61f66ffd5fadc3e9f01b0d38"}},{"date":"01/30/2022","dailyClicks":1,"_id":{"$oid":"61f66fff5fadc3e9f01b0d3c"}}]}]

db.collection.aggregate([{$unwind:{"path":"$dayWiseClicks"}},{$group:{_id:{"oid":"$_id","date":"$dayWiseClicks.date"},"dailyClicks":{$sum:"$dayWiseClicks.dailyClicks"}}},{$addFields:{"_id":"$_id.oid","date":"$_id.date",}}])