[{_id:1,batchId:100,batchAddedAt:1705319255,driverStatus:"hello ONE"},{_id:2,batchId:100,batchAddedAt:1705319257,driverStatus:"hello TWO"},{_id:3,batchId:200,batchAddedAt:1705319230,driverStatus:"other ONE"},{_id:4,batchId:200,batchAddedAt:1705319240,driverStatus:"other TWO"}]

db.collection.aggregate([{"$group":{"batchAddedAt":{"$max":"$batchAddedAt"},"driverStatuses":{"$addToSet":"$driverStatus"},"_id":"$batchId"}},{"$match":{"batchAddedAt":{"$gte":1705319256}}}])