If so, it will only create Hubitat devices, one for each Harmony Hub Activity. This allows Hubitat to know which Harmony Activity, if any, is "On". It also allows Hubitat to change the Harmony Activity, or to turn off the current Activity.
Individual Harmony Hub 'devices', like your TV, Receiver, XBOX, Playstation, etc... will not be created within Hubitat as Hubitat 'devices'.