The only way to have Smart Home devices show up within Logitech's Harmony platform, is via an official Logitech integration (e.g. SmartThings, Lutron, Philips Hue.) Unfortunately, Logitech stopped accepting new official integrations many years ago. And now that they have stopped production of Harmony remotes, we're all just on borrowed time before they eventually shut down their cloud servers.
Using my community Harmony integration for Hubitat, it is possible to use the Smart Home buttons on those Harmony Hub remotes that have them. The process is described in my Harmony Integration thread. Our goal was to allow the Smart Home buttons to be used in Hubitat as a Button Controller device. This allows for easy use in all of the Hubitat's standard Apps.
