Also, if it’s this device:
https://products.z-wavealliance.org/products/3399
Then pushing a button sends a message to the associated zwave device via Z wave direct association. So if you haven’t set up any associations, of course you won’t see anything happen when the button is pressed.
If you want to look at a DTH for similar device, look at the aeotec wallmote.
[RELEASE] Aeon WallMote Dual & Quad - 2 & 4 Button
( also, you are going to need the tweaker anyway: that device has a ton of parameters that need to be set. )