No auto run of watch-apps or widgets. Only CIQ watchfaces will start at boot (if one is your configured watchface)
It seem that watchface app couldn't use BLE.
Correct. The closest a watch can come to doing comm, isn't that close. All it can do is display the "phoneConnected" status, to show if the watch and the mobile are "connected".
And currently, there is no "background running of CIQ watch-apps and widgets" available. The only time a CIQ widget or watch apps is running is when it's in the foreground (you can see it).