That is where my app falls short, also due to the way the "carrousel" function works in the FYT software.
It only enables the software/hardware options your unit has. It means that your "carrousel" can contain 5 options or up to eight options.
The several bluetooth options do not work in my app as there FYT "changes" things over unit versions (Sofia 3GR / PX5 / (sc9853i/7731) / (uis7862/usi8581a) ).
It would be possible to simply first test for Android version and then call the appropriate BT function, but I don't feel the need myself anymore. It is Open Source: you can alter it to your liking.