Nearby interactions with more than 1 iPhone

I am working with the nRF52840 / DWM3000EVB kit and the Apple Nearby Interactions demo.

I have the 1 to 1 ranging working fine, but now want to have more than 1 iPhone ranging from a single anchor.

I have made the necessary changes to the Bluetooth to allow additional connections, but I can’t see how to start subsequent ranging sessions without the original session stopping.

Has anyone succeeded with this that can point me in the right direction?

Thanks