I am getting different layout while working on the below demo. As per UI path demo there is activity "attach window: however I am not getting this Attached are the snips.
The main reason is you are using studio with modern design experience and course shows classic experience
We can change them
go to Home (Studio Backstage View) > Settings > Design , and set the Use Modern for new projects toggle to enable or disable the Modern Design Experience project setting for all newly created projects