WiFi is of course radio. We just tune in and listen to it differently.

If you limited your bandwidth to 20 or 30 kHz, you could build a “radio” that you manually tune to a WiFi channel frequency and that produces audible noise. You could then build a 1980’s style modem to convert the audio back into a bitstream that you could run your network connection over.

It would be about many times slower than standard Wifi though modern compression could speed that up a bit.