Interesting. Could be! Expecting alien worlds to communicate via radio waves might be like expecting to hear the sound of drums to communicate across interstellar distances.
What if some advanced alien civilization left behind an FTL communication device? One perhaps intended only for discovery when we are advanced enough to recognize it for what it is?
Or maybe a subspace frequency modulator, or perhaps a temporal subway.
We’ve had radio now for about 125 years and already its replacement by a vastly superior technology is on the horizon. Expecting to find a civilization while in that brief phase where radio is the dominant means of communication seems very unlikely.