namannigam

       //https://stackoverflow.com/questions/67570361/how-to-identify-duplicate-records-in-a-list
       Map<Boolean, List<MyVo>> partitionBasedOnRegistered = dataList.stream()
                .collect(Collectors.partitioningBy(MyVo::isRegistered));

        List<MyVo> unregisteredBusinesses = partitionBasedOnRegistered.get(Boolean.FALSE); // here
        List<MyVo> registeredBusinesses = partitionBasedOnRegistered.get(Boolean.TRUE);

        Map<String, List<MyVo>> groupByRegistrationNumber = registeredBusinesses.stream()
                .collect(Collectors.groupingBy(MyVo::registrationNumber));

namannigam

{
  "queryPlanner": {
    "plannerVersion": 1,
    "namespace": "mongo_experiments.product_snapshot_composite_index",
    "indexFilterSet": false,
    "parsedQuery": {
      "uIdHash": {
        "$eq": "2lgys2yxouhug5xj3ms45mluxw5hsweu"
      }
    },