Database
[{date:ISODate("2022-01-01T03:28:00.000+00:00"),value:1},{date:ISODate("2023-11-02T03:28:00.000+00:00"),value:3}]
Query
db.collection.aggregate([{"$group":{"_id":{$dateTrunc:{date:"$date",unit:"day"}},"total":{"$sum":"$value"}}}])