GraphQL Dynamic Subfields

Question

We have the following GraphQL schema type

type Values {
  somestring: String
  someparent(id: ID!): ChildType
}

type ChildType {
  dataset: JSON! #custom generic json scalar
}

and when we query for the data from the above type (lets say we passed ID of 8), we get the following.

{
  "somestring": "string valueees",
  "someparent": {
    "dataset": {
      "dynamicValue1": {
        "staticKeyA": "some value",
        "staticKeyE": "there value"
      },
      "dynamicValue2": {
        "staticKeyA": "new value",
        "staticKeyE": "abcd value"
      }
    }
  }
}

In the above result only the keys dynamicValue1 and dynamicValue2 are dynamic, however everything is static. The dynamic keys changed based on the id passed to someparent.

In terms of typescript we would define the interface as

export interface DatasetInterface {
  [dynamicValueId: string]: DynamicChildInterface;
}

export interface DynamicChildInterface {
  staticKeyA: string
  staticKeyE: string
}

What we want to do is without using JSON allow a user to query based on the subfields of the dynamicvalue key objects. However, we don't care about the name of dynamicValue1 and dynamicValue2, (its ok if it does not show up on autocomplete, or the schema). So we do not want to worry about

query {
  Values {
    someparent {
      dataset {
        # we don't care about dynamic value 1 and we don't need to autocomplete the user even
        dynamicValue1 {
          staticKeyA
        }
      }
    }
  }
}

1. Is the following assumption correct? From our understanding, the schema needs to be static, and since the dynamic key changes based on the id, there is no easy way to provide the schema definition whenever the id changes. Next grapqhl is strongly typed and every graphql type needs to have an explicit "name" defined in the schema. We also looked at custom scalars, but we need to be able to have subfields as well.

2. Is this even possible in graphql, if so how or what path do we need to take?