You're right, because the nRF52 series are Bluetooth Low Energy (BLE) devices, they can't stream music at all :-) Music streaming is done via Bluetooth Classic (as of now). BLE != Bluetooth Classic
https://www.nordicsemi.com/News/2020/01/Nordic-launches-a-Bl...
Like if a chip supports Bluetooth 5.1 that should include both, no?