Hi @Mickael_Fzu
I wanted to definitely get my facts straight here, so I checked with a higher technical authority on our team, and I can confirm what Dean said is true. Controllable trainers are supported over the ANT+ FE-C protocol on Android Zwift.
As it was explained to me, there are some additional Android add-ons that you may need to install. This should all be explained in the related FAQ.
Double-check that FAQ and if you want to give ANT+ FE-C another go for controllable, feel free to do so. Otherwise, BLE pairing is always a good alternative as you’ve discovered.
Thanks!