They're probably only comparing open protocols. If one doesn't care if their protocol is proprietary then sure one might consider zwave. But it's hardly "surprising" that it's left out.
All three of them have their shortcomings. Matter requires an unsecured IPv6 network to operate; I have my doubts about it having any longterm future.
How is Matter (APL2) over OpenThread (BSD-3-Clause) not "open"?
> Matter requires an unsecured IPv6 network to operate
How is this network "unsecured" exactly? Thread IS encrypted and authenticated.
Just like HDMI, if you want to build a device that uses Zwave, you must pay for the privilege.