That's what I've found as well. Yeah they are Z-Wave Alliance "members"... so am I... big whoopie.
What this does mean though is we do not know what functions/features they DO NOT support in their controller (software). This may actually be why so many Z-Wave problems exist (Locks??? hello???) and other Z-Wave devices acting... funky? Hubitat in general does a great job at most things but there is a SERIOUS lack of Z-Wave help or info and LOTS of push to use ZigBee.... I'm pretty sure they're related.