Just to provide some details on why this isn’t magic
Bluetooth is different from ant+ in how the connections work
With bluetooth when the device broadcasting is paired to another device (the recording device) it is a two way connection (primarily so that they can jump frequencies if the signal degrades) and the broadcasting device cannot be paired with any other devices
With ant+ it is broadcasting the data and doesn’t not receive anything back in kind, so you can pair multiple recording devices at the same time to the same broadcasting device