Dex default Audio on S21 Ultra?

[WuPangPang]

I have an odd issue on the S21 Ultra. When you connect to a display and run Dex (using a cable) the default audio stays on the phone and does not switch to the display device.

On the S20 and Note20 Ultra we don't have this issue. Once you connect it auto switches audio output to the display device.

How can I fix this or is it a bug?

[GoanGeek]

I haven't tried it,
But can you scroll down from top of your phone (as you would for notifications)
Then tap on devices and see if option to change audio source is there?

It's normally for smarthings

[AndrewL]

@WuPangPang: While connected to an external display, and in DeX mode, please head to Settings > Samsung DeX > Set Default Audio Output, and toggle this option on to play sounds through the connected TV or monitor by default.