How to retrieve "to" number in Twilio Voice callbacks when using React frontend and Python backend?

I have created a Twilio application in Python using the client like this:

application = client.applications.create(voice_method='POST',
                                         voice_url='<voice-url>',
                                         status_callback='<voice-status-callback-url>',
                                         status_callback_method="POST",
                                         sms_url='<sms-url>',
                                         sms_method='POST',
                                         sms_status_callback='<sms-status-callback-url>',
                                         friendly_name='xyz')

Whenever a call needs to be made, I generate a token, add voice grant and send the token to React Front-end, and React uses JS SDK's Device.connect() to make the call like so:

  const callTwilioNumber = (token, phoneNumber) => {
    const postData = {
      phoneNumber: phoneNumber
    }
    currentCallDeviceCopy = new Device(token);
    let conn = await currentCallDeviceCopy.connect({ 
      params: {
        To:response.data.data,
      }
    });
    }).catch((error) => {
      ... Error handling ...
    });
  }

When I get callbacks using this implementation, The "to" parameter within the callback is an empty string. Is there any way to get the "to" num in the callback?

I have tried sending custom parameters in the Device.connect() method, but these custom parameters go to the application, and are not returned in the callbacks.

Found the answer to my issue, and I'm posting the resolution for reference. The issue was that the call I was making had child calls that contained "to" and "from" numbers and other information as well. Whenever a call is made to a number which contains automated routing, call forwarding, or potentially even answering machines, then another child call is being made to the target phone number.