There is a similar case with Qubo and Apple TV 4k. If a power meter other than Qubo is paired with Zwift first, Qubo can’t be paired as controllable trainer because it will not be found any more in the pairing screen. The only solution is to pair Qubo first as power meter. This will pair it as controllable trainer at the same time.
Then you have to unpair the power meter and pair it with the power meter you actually want to use. But this is pretty difficult because unpairing the power meter puts Zwift into an endless pairing loop (bug) where screen elements jump back and forth on screen. I would hope this bug gets more attention, it has been reported earlier (Fix the Apple TV App PLEASE - #19 by Petri_Latva-Rasku).