How to get parameter binding in Azure Function - isolated process?

Let's start with the following 2 parameter objects:

public class ParameterObjectQueryString
{
    public string Name { get; set; }
}

public class ParameterObjectBody
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
}

If used in the following two functions they behave as expected: the values of the querystring (name=value) or the body are mapped to the parameter object.

{
  "firstName": "Ivo",
  "lastName": "Verburgh"
}

Usage in In-Process Azure Function

[FunctionName("Function1")]
public static async Task<IActionResult> Run(
    [HttpTrigger(AuthorizationLevel.Function, "get", Route = null)] ParameterObjectQueryString parameterObjectQueryString,
    ILogger log)
{
    log.LogInformation("C# HTTP trigger function processed a request.");
 
    string name = parameterObjectQueryString.Name;
 
    string responseMessage = string.IsNullOrEmpty(name)
        ? "This HTTP triggered function executed successfully. Pass a name in the query string or in the request body for a personalized response."
        : $"Hello, {name}. This HTTP triggered function executed successfully.";
 
    return new OkObjectResult(responseMessage);
}
 
[FunctionName("Function2")]
public static async Task<IActionResult> Run2(
    [HttpTrigger(AuthorizationLevel.Function, "post", Route = null)] ParameterObjectBody parameterObjectBody,
    ILogger log)
{
    log.LogInformation("C# HTTP trigger function processed a request.");
 
    string name = $"{parameterObjectBody.FirstName} {parameterObjectBody.LastName}";
 
    string responseMessage = string.IsNullOrEmpty(name)
        ? "This HTTP triggered function executed successfully. Pass a name in the query string or in the request body for a personalized response."
        : $"Hello, {name}. This HTTP triggered function executed successfully.";
 
    return new OkObjectResult(responseMessage);
}

The above 2 functions will work as expected, they get the parameter values from the querystring or the body.

If I try the same in Azure Function - Isolated Process. It would look like this:

        [Function("Function1")]
        public HttpResponseData Run([HttpTrigger(AuthorizationLevel.Function, "get")] HttpRequestData req, ParameterObjectQueryString parameterObjectQueryString)
        {
            _logger.LogInformation("C# HTTP trigger function processed a request.");

            var response = req.CreateResponse(HttpStatusCode.OK);
            response.Headers.Add("Content-Type", "text/plain; charset=utf-8");

            response.WriteString(parameterObjectQueryString.Name);

            return response;
        }

        [Function("Function2")]
        public HttpResponseData Run2([HttpTrigger(AuthorizationLevel.Function, "post")] HttpRequestData req, ParameterObjectBody parameterObjectBody)
        {
            _logger.LogInformation("C# HTTP trigger function processed a request.");

            var response = req.CreateResponse(HttpStatusCode.OK);
            response.Headers.Add("Content-Type", "text/plain; charset=utf-8");

            response.WriteString($"{parameterObjectBody.FirstName} {parameterObjectBody.LastName}");

            return response;
        }

Both examples don't work, and apparantly the HttpRequestData is also needed to create a response. It would be nice to have a way of getting this to work as in the InProcess Azure Function