No "Allow Console Streaming Option"

the option is now under Devices & Streaming in your Xbox Settings

open Settings

select Devices & Streaming

select Device Connections and you should find the options there

I have already checked this option. I checked Allow game streaming to other devices and allow play to streaming.

Don't see how this actually would come as a problem...

Anywho, try go into the Settings of your console and Preferences and make sure 'Allow game streaming to other devices' is unticked.

It partially worked... For Windows 8.1 I don't get the device after I unchecked the Allow Play To streaming option. But on Windows 10 I still get the device (even with Allow Play To streaming & Allow game streaming to other devices unchecked).

As for why... It is not really a problem. It doesn't seem correct behavior (and I blame Windows for that) to just create an endless amount of devices.

On your party options you have an option that you have to check to include your audio on the stream and on her stream settings she need to allow party audio

Thank you for taking the time to post this on the Xbox Forums. We understand that you are seeking a way to use your mobile device to use Xbox Console Streaming.

In order for you to be able to use this, you will need to install the
Xbox Insider Hub on your console, and update your console to use at least the
Omega ring.

This will in turn allow you to configure your console from a new option in your
Devices & streaming to allow you to set-up Console streaming.

This should then allow you to see your console in the Console streaming section of the
Xbox Game Streaming app.

You should be able to find more info on this on the
Xbox Game Streaming Support Hub.

I hope this is of some use to you.