How to send status code with message .NET Core Web API

Question

I am working with two Web API projects. I am getting response from one API to another API with status code and message. Using following method I need to send status code with message.

[HttpPost]
public async Task<string> CreateOrder(Order order)
{
        string jsonResponse = null;
        HttpClient client = new();

        var payload = new JsonPayloadBody();
        payload.Api = new Api();
        payload.Header = new OrderHeader();

        payload.Api.NAME = "CREATE";
        payload.Api.QUERY = "CREATE_ORDER";

        payload.Header.INTERFACE_RECORD_ID = order.INTERFACE_RECORD_ID;            
        payload.Header.INTERFACE_ACTION_CODE = order.INTERFACE_ACTION_CODE;                                                                               

        payload.LineItems.Add(li); }

        var orderPayload = JsonConvert.SerializeObject(payload);
        var payloadObj = JsonConvert.DeserializeObject<MHScaleMessage>(orderPayload);
        var requestPayload = payloadObj.ToJsonString();
        var stringContent = new StringContent(requestPayload, Encoding.UTF8, "application/json");
        HttpResponseMessage response = await client.PostAsync(_baseUrl, stringContent);

        if (response.IsSuccessStatusCode)
        {
             jsonResponse = await response.Content.ReadAsStringAsync();
            _logger.LogInformation(jsonResponse);
            _logger.LogInformation("Order created successfully");
        }
        else
        {         
            _logger.LogInformation("Order creation filed");
        }

        return jsonResponse;
}

Using this line

jsonResponse = await response.Content.ReadAsStringAsync();

I was able to send message to postman but it's sending 200 status code always. So I need to send status code according to the response, for example:

return NotFound 
return Ok 
return BadRequest