Hello,
to use the new matterhub with zwave-js and alexa follow this steps:
Install matterhub:
Add this in the addon store under repositories.
After installing start it and and open the user interface.
Add a bridge
Include
Type: platform
Value: zwave_js
Save
Sometimes a restart of the intergration is necessary or home assistant or your alexa device.
In the addon under protocol you can find a qr-code.
The qr-code from the matterhub page doesnot work for me.
Go to alexa, add a new device, choose other and look for matter, scan your qr-code. Accept that it is not certified. Wait. After round about one minute you see your devices