That’s a very popular device class, and there are multiple manufacturers producing zwave smart plugs in different formats and with somewhat different features. You shouldn’t have any trouble finding one.
Most will do at least basic on/off straight out of the box without needing any special code. It’s a pretty simple device class.
If you want energy reporting, though, that’s an entirely separate issue, so let us know.
Since you mentioned enbrighten, I assume you are in North America, and have a SmartThings/Aeotec hub.
If that’s the case, any of the following brands should have several models that would work, and anything which is Series 700 would be among the newest Z wave technology.
In the order of which I think probably work best with smartthings at this moment, although that may change in the future, once the platform transition is complete, and there are more edge drivers available…
- Zooz. House brand for the specialty retailer The Smartest House. Several different models. Anything with S2 security is good and the series 700 are even better.
Budget priced with excellent engineering features and excellent tech-support, this is a very popular brand. The company has already released custom edge drivers for most of their models.
Search Results - The Smartest House
- Aeotec. More expensive than Zooz. Also has multiple models with some of the newer technology.
https://www.amazon.com/Aeotec-Switch-Wireless-Control-Automation/dp/B08PKLBKW4
- Minoston. A budget brand.
https://www.amazon.com/Minoston-Monitor-Required-SmartThings-MP31ZP/dp/B09SGXMJ2R/
There are many more brands, these are just a few examples of the more popular ones. So I’m not sure where you got the idea that this class doesn’t really exist. The official Z wave alliance has over 20 pages of certified devices in this device class, although not all of them are the newest technology, of course. 
You may have gotten confused because there’s no one standard term for this type of device. Some manufacturers say “smart plug,“ some say “smart switch,“ some say “plug in module.” And up until about 2021 We mostly called these “pocketsockets“ in this forum, in order to distinguish them from inwall outlets, but then we kind of moved back to “smart plug“ as the manufacturers did so.
https://products.z-wavealliance.org/Search/Index?regionId=2&searchText=Plug