Using internal speakers after usb c is plugged in

Why isn’t there a toggle for audio output after a usb c hub is plugged into the usb c port? After the hub is plugged in all audio is routed to the 3.5 jack on the hub, even if there isn’t headphones plugged in. I still want to listen to music on the internal speakers while loading and uploading files to usb or micro disk.

This seems like a simple thing to want, yet I’m forced to unplug the device from the iPad Pro to continue to listen to music, then replug in hub to load files. Ridiculous...c’mon apple, this needs to be addressed.