"WiFi" when used with home automation devices usually means proprietary. And that means the specification to control the device does not exist to the public. And that means no one can write a driver. No driver, it can't be integrated into Hubitat.
Hubitat does have many integrations for WiFi products that have the API published. The latest is Matter over WiFi, for example.
You'll need to be more specific with the model of Leviton but I'd have to guess, no, they cannot be integrated. There is a discussion from 2020 related to Leviton WiFi and a driver was created that used Leviton's Cloud.
