nRF5340 How do we connect with Bluetooth Classic and Auracast at the same time?

We are looking to use the nrF5340 as a Bluetooth Classic Bridge to Auracast Transmitter. 

There are some products on the market that allow you to make a standard bluetooth classic A2DP connection and then this same chip allows for the re-transmission in LE Audio 

For example you make a standard bluetooth audio pairing to the device, then it will also allow for BIS or CSB?

BLUETOOTH CONNECTIONLESS SLAVE BROADCAST BURST MODE ( not sure if this is what it is called?)

Basically the topology is that someone with a legacy phone can pair to the speaker, then that speaker can act at the same time in dual mode as a transmitter for Auracast.

Has anyone made a feature work like this on the nrF5340? what is the correct terminology for this type of connection and are there any example code for this type of "Bridged" connection?

We have 5pcs  NRF5340-AUDIO-DK

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