[{uid:"1",status:"completed",created_at:"29 - 06 - 2021",},{uid:"2",status:"pending",created_at:"27 - 06 - 2021",},{uid:"3",status:"missed",created_at:"24 - 06 - 2021",},{uid:"4",status:"completed",created_at:"13 - 06 - 2021",},{uid:"5",status:"pending",created_at:"24 - 06 - 2021",}]

db.collection.aggregate([{"$group":{"_id":{"created_at":"$created_at"},"pending":{$sum:{"$cond":[{"$eq":["$status","pending"]},1,0]}},"missed":{$sum:{"$cond":[{"$eq":["$status","missed"]},1,0]}},"completed":{$sum:{"$cond":[{"$eq":["$status","completed"]},1,0]}},}}])