Unable to stream Desktop Interface using Android

Hi I was hoping to use mobile streaming to stream my phone to my friends while using Android 10 / LG's Desktop Interface (I know LG uses Screen+ and Samsung uses Dex but they both appear to be the same thing) but if I use mobile streaming it can only stream the main display (the one on the phone) I was hoping discord could add the ability to choose a display similar to Desktop if an android device has 2 or more displays attached.