One potential solution could be to check that your audio output device is set as the default device in the operating system, and that the volume is turned up.
You can also try using a different audio output device (such as HDMI or the 3.5mm jack) to see if that resolves the issue. Additionally, you can check the Unreal Engine documentation for information on configuring audio settings for different platforms, as well as troubleshooting tips for common audio issues.
If you still don’t get any audio, it could be that the device doesn’t have proper libraries to run the expected audio drivers.