Just because some of the hardware is present, it does not mean it is functional or can be made functional.

I believe someone mentioned that they believed that the same component comprised bluetooth/FMRX/FMTX hardware, & that only the bluetooth was being used.

If there is no connection from that component to other significant components, or if other significant components are missing, for instance connection to an to FM antenna for transmission, software will not produce it as a useable feature.