The Viiiiva takes ANT+ and bridges it to BLE. If you are using ANT+ on your Mac, then it should only be sending HR to TR via ANT+. First, make sure to “Forget” the Viiiiva. Next pair your power meter, cadence sensor, and trainer first. Now, put on your Viiiiva and pair it. What happened? Screenshot?
As for via Bluetooth, if I get a chance, I will test it and update.