[{"document_name":"My Document","status":[{"status_time":ISODate("2020-06-09T17:56:34.350Z"),"status_title":"Sample Title 1"},{"status_time":ISODate("2020-06-10T17:56:34.350Z"),"status_title":"Sample Title"}]}]

db.collection.aggregate([{$addFields:{status:{$reduce:{input:"$status",initialValue:{initialDate:ISODate("1970-06-09T17:56:34.350Z"),doc:{}},in:{initialValue:{$cond:[{$gt:["$$this.status_time","$$value.initialDate"]},"$$this.status_time","$$value.initialDate"]},doc:{$cond:[{$gt:["$$this.status_time","$$value.initialDate"]},"$$this","$$value"]}}}}}},{$addFields:{status:"$status.doc"}}])