Broadcast_audio_sink not connecting/showing through nrf connect mobile app.

We are trying to make a bluetooth speaker to connect to our phones. We are using the broadcast_audio_sink sample on the nrf5340 dk and when testing it with the nrf connect mobile app the board is not showing. You know any solutions on how to solve this problem? 

We get to build the code into the board but once we flash it and try to connect its not working. Are we missing some additional features.

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