I've got Bluetooth running by adding (bluetooth-service) to my list of services and connecting my devices via 'bluetoothctl', which are now fully functional, yet the GNOME Settings panel for Bluetooth still says it couldn't find Bluetooth and asks me to insert a Bluetooth dongle.
It doesn't bother me much since after trusting/pairing my devices, they now connect automatically after a reboot, but it's an inconvenience nevertheless. Taylan