Get validation bsonType for a single field

Working with Data
1

I try to get the validation bsonType recursively for a single field at a time in order to perform some conversion before sending the data into db.
For example I have this jsonSchema validation:

{
  "validator": {
    "$jsonSchema": {
      "bsonType": "object",
      "required": [
        "address"
      ],
      "properties": {
        "address": {
          "bsonType": "string",
          "description": "required address as string"
        },
        "accessDates": {
          "bsonType": "array",
          "items": {
            "bsonType": "object",
            "properties": {
              "accessDate": {
                "bsonType": "date",
                "description": "access date"
              }
            }
          }
        }
      }
    }
  },
  "validationLevel": "moderate",
  "validationAction": "error"
}

This is not a real world example, I created it this way to add extra complexity. Now, let’s say I want to insert the following data:

{
  "address": "some address",
  "accessDates": [
    {"accessDate": "2021-01-01"}.
    {"accessDate": "2021-01-02"}
  ]
}

The question is how can I get bsonTypes for the following:

address,
accessDates,
accessDates[].accessDate

Or, is there any other way to convert json to bson before inserting intot DB?