I do not own a Hub2 but was for some time interested so Iread somethings about it in [APP][Cloud & Pro] SwitchBot (Release 1.1.51, Test 1.1.56)
I cannot find better info now. But what I think is that like the message says: you need to connect other devices to the Hub before it can be connected through matter to Homey (a hub is not a device only a connector).
The other functions of the Hub 2 can only be used icm with the app for Switchbot. But that you could check in hte post and with the developer of the app.
