The extra sensors on their web site look like the Ecowitt / Misol sensors. I have an app for those brands that use a local connection Misol and Ecowitt App for Homey | Homey
Setup instructions are here [APP][Pro] Misol and Ecowitt (Release 0.1.49, Test 0.1.52 ). You could look at that to see if anything is familiar in your WS setup.
The web site also mentions an API but I can’t find any details. If you can get a link to their API documents than I will be happy to take a look.
Edit: A quote from HA app page:
This integration communicates with Ambient Weather PWS units via the Ambient Weather Cloud. Users wishing to explore a local option are encouraged to explore the Ecowitt GW1000, a small device that is able to read RF signals directly from the PWS and transmit them to a variety of other applications
The Misol and Ecowitt app supports the GW1000. Maybe if you get one of those you can pair the sensors to it. I’m not sure if a sensor can be paired to more than one receiver but if they are just sending data then there is a good chance it will work.
