Zwave doesn’t have The same check in structure that zigbee does, so it’s not typically used for presence sensors. There was one zwave presence device announced about two years ago but I don’t think it ever came to market.
There are some other options. Most of them are phone-based, but it is possible to also use an IBeacon. That’s what I use at my own house because I wanted a very small detection area, limited to the wheelchair ramp at my front door.