I found the Add Z-Wave in the Homey App of devices .
I have located the Homey device 4 inches from the Secure SST302, put the SSR302 into Learn Mode (Include) and added the device in Homey where the Homey interface says Please put your Z-Wave device in ‘Learn mode’.
How long does this normal take they have been sat there doing this for 20 mins now and no sign of movement.
If the device is not supported by a/the app, then it will only work as a simple on/off device, nothing more, nothing less.
So the easiest solution is to ask the developer to add it into the app,
The 2nd easiest is to return this one, and buy one that is supported by Homey.
the 3th easiest is to add support for it yourself.