Database
[{"Dashbo":1,"entered_date":ISODate("2021-01-01")},{"Dashbo":3,"entered_date":ISODate("2021-01-02")},{"Dashbo":2,"entered_date":ISODate("2021-01-03")}]
Query
db.collection.aggregate([{"$setWindowFields":{"partitionBy":null,"sortBy":{"entered_date":1},"output":{lag:{$shift:{output:"$Dashbo",by:-1,default:"Not available"}},lead:{$shift:{output:"$Dashbo",by:1,default:"Not available"}}}}}])