I have been running trainerroad and zwift simultaneously for close to 2 years now on two setups at the same time (wife and I both have wahoo kickrs).
I do either:
Bluetooth connection from kickr to trainerroad on Android phone (erg mode).
ANT+ connection from kickr to laptop with dongle for zwift (power pairing only, not controlling).
Or:
Bluetooth to Apple iPad/apple tv for zwift and ANT+ to phone for trainerroad.
In either case you need two devices, one for TR and a separate one for zwift. Hope that makes sense.
I do either:
Bluetooth connection from kickr to trainerroad on Android phone (erg mode).
ANT+ connection from kickr to laptop with dongle for zwift (power pairing only, not controlling).
Or:
Bluetooth to Apple iPad/apple tv for zwift and ANT+ to phone for trainerroad.
In either case you need two devices, one for TR and a separate one for zwift. Hope that makes sense.