Can the quality of the generated openapi specs be increased and can you provide a download of a JSON schema for the whole API?

Hi, we are using the apigateway JSONSchema to define our lambda endpoints. It works fine, even with multiple types including null. The OAS30 doesnt support multiple types and/or nullable attributes. example:

someField: {
      type: [JsonSchemaType.NUMBER, JsonSchemaType.STRING, JsonSchemaType.NULL],
},

should output something like

someField: {
    "oneOf": [
        {
        "type": "number",
        },
        {
        "type": "string"
        }
    ],
   nullable: true
}

but it outputs:

someField: {
      "type": "object"
},

This is annoying because I need to provide specs to consumers of my api, and now I have to do some awkward post-processing.

My two feature requests and one nice to have:

Feature request 1: support nullable and multiple types in the exports (it seems de validation does work as expected)

Feature request 2: support export the whole API as JsonSchema: I'd like to export the whole API as JsonSchema, that would probably output the multiple types as is. Then I can generate my own openApi spec file (if null is in types array, add nullable: true etc).

Nice to have: export OAS31 format but that's a question that has been asked already.