Have tried to find the Dual Audio in the setting and bluetooth menu, has it been removed from the beta programme and will it be reintroduced in the final update?
On Android 10, some improvements have been made to the 'Dual Audio' feature. The separate menu for advanced Bluetooth settings has been removed. Instead, the "Dual Audio" function can be found in the notification panel (Media and device) when two BT devices that support multimedia sound are connected.
To use the "Dual Audio" option, follow the path below:
1. Connect two BT devices that support multimedia audio
2. Drag down the notification panel
3. Select the 'Media' button
4. You can choose a device that can play audio. After selecting two BT devices, the dual audio function will be activated.
Have a great day!