I have the same problem:
Zwift app on my android don’t find my kinetic road trainer smart. I’m unable to ride.
Zwift app only find my Viiiva heart rate sensor.
My android find the trainer via bluetooth, and the Kinetic app also find it.
I also have a Iphone and it also finds the trainer and works well.
So i think the problem is in the Android Zwift app.
Do you have a solution for this?