I would guess that that is normal. You probably only have one activity in your hub, and that is what is shown.
To se your devices you have to add Harmony devices in Homey.
EDIT It seems like ther is a bug in the text. When I select to add an activity it says Device in the header when I need to select the activity. Haven’t noticed it before since I know what I want to do and don’t care about the text.
I never read included instructions either when I buy new gadgets…