nRf5340 handsfree and i2s

Hello everyone. I have just started with the eval board uBlox NORA B1 (NORA B-106) and I am trying to find a starting point for streaming audio via Bluetooth Handsfree protocol with i2s on hardware side. 

I have already installed nRF Connect and the SDK 1.8 by the toolchain manager on Windows 10. The IDE I am using is Open Segger Embedded Studio.

There is an example "handsfree" what I have tried, but I can't  see it while scanning devices in nRF Connect for Android on my smartphone (Nokia 7 plus).

Any suggestions how to start and what has been prepared for getting a good point to start?

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