As far as I know there is no way to set up the WiFi on the power bar without using the Incipio Homekit iOS app. I first did the full setup and tested the operation of the power bar, and it worked fine. And when I checked Home Assistant, it was already prompting me to add a newly discovered device in my Homekit integration. But when I tried to do that, it complained that the device was already paired somewhere else, so I had to delete the power bar from the Homekit app. That kept the existing WiFi assignment on the power bar, and let me add it to Home Assistant. Home Assistant sees it as 4 switches, they work.