I've just realised this bridge just replicates 433MHz control signals, initiated by EWELINK or Alexa.
What I thought it did, but unfortunately not to be. Was that I could control an S20 smart switch with a 433Mhz remote control!
i.e. The bridge took the appropriate learnt 433Mhz remote control signal and applied via the server and glue software, to, for instance, a S20 Smart switch and turn it OFF or ON.
Confused dot com, or what?