Database
[{"propertyId":1001820437,"date":ISODate("2020-07-17T00:00:00.000Z"),"HList":[{"productId":123,"name":"Dubai","tsh":true}],"PList":[{"productId":123,"name":"Dubai","tsh":false},{"productId":234,"name":"India","tsh":true}],"CList":[{"productId":234,"name":"India","tsh":false}]}]
Query
db.collection.aggregate([{$project:{"HList.tsh":0,"PList.tsh":0,"CList.tsh":0,}},{$project:{products:{$setUnion:["$HList","$PList","$CList"]}}}])